🔥 EXPLAINED! Must v Have To v Should (🔗 FREE pdf Worksheet)

Guess what... "Must" and "Have to" DO NOT always mean the same thing! 😱 Watch this video to find out when to use which one, and when we need to use "Should" instead!
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► CHAPTERS:
00:00 Different ways to use MUST and HAVE TO
01:37 Must and Have To | Obligation, Present Tense
4:22 Must and Have To | Obligation, Past Tense
6:16 Common Mistake Using Must
6:56 Must and Have To | Probability, Present Tense
9:54 Must and Have To | Probability, Past Tense
12:39 Should in the Present and Past Tense
* * *
► TRANSCRIPTION
If you think must and have to are practically the same thing, you are wrong. And this is why.
Now, great news! This lesson comes with a free PDF worksheet. So click up there, or click the link in the description and you can download my lesson notes on this video. It comes with all the explanations, all the examples and a test to test your knowledge on the difference between must and have to.
We use both these verbs to talk about obligation, like you must do your homework or you have to do your homework. And also probability. Like wow, she got 100% on her exam, she must be clever. So sometimes these mean almost the same thing, like you must do your homework, you have to do your homework. But sometimes they don't and they mean very different things. So to help me explain this category, which most students get confused with, I'm going to divide the lesson into five parts.
First we'll look at obligation in the present tense, and then obligation in the past tense, then probability in the present, probability in the past. And we cannot learn this topic without looking at topic number five, how to use should. So let's go.
We can use both must and have to in the present tense to talk about obligation. But there's one very important exception that I'm going to explain in this section. So first let's look at how to use must talking about obligation in the present tense. And we normally use this for things like rules and regulations. Like you must check in 40 minutes before the time of your flight. You must wear a mask at all times in the airplane.
We can use must in the negative to explain that something is forbidden, that it is prohibited, and to form it in the negative is very simple. Instead of must, we say must not. For example, you must not smoke inside the building or you must not arrive late. Simple.
Now, we use have to in the present tense again to talk about obligations. We don't use this so much for things that are regulations and rules, but simply things that are necessary. For example, you have to practice if you want to improve. I have to go to work early tomorrow because I have a lot to do. These are both things that are necessary. They're not regulations or rules, but they are necessary things. And that's why we use have to.
Now, for the big exception in the present tense, when we use have to in the negative, it completely changes the meaning. If we use must in the negative, you must not smoke inside the building, that means that it is forbidden. But if we use have to in the negative, it means that something is not necessary, but you can do it if you want. For example, in a hotel, if we say you must not take the key with you when you leave the hotel. That means that it is forbidden to take the key outside the hotel. However, if we say you don't have to take the key with you, that means you can if you want, but it's not necessary.
Do you see the difference? You must not means it's forbidden, but you don't have to means you can if you want, but it's simply not a necessity. It's not necessary.
[... Due to character limit, the rest of this transcription is unavailable]
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► Thanks, as always, for your LIKES, COMMENTS and SHARES!! 🙏
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Your British English Teacher,
~ Greg 😀
#EnglishWithGreg #LearnEnglish #EnglishGrammar #B2 #C1 #ESL

[@maisavilanova291]

Hi! I'm Brazilian and my English is getting better with you. Thanks 😍

[@AvOs1976]

Me too! From Rio! Abraços! 🎉

[@berenice-6003]

Thank you Greg, explanations always so clear it is very useful as with each video🙏

[@donadonev5473]

Hi Greg, your explanation is fantastic!!!! Thank you so much!!!!!!

[@pablobaio9435]

Sometimes is hard for non-native speakers to learn the slightly diference on some uses, so this video is very useful. Another great one. Cheers.

[@ingrid-6367]

Love your lessons❤

[@savanpatel9608]

Hi Gerg, I love watching your videos regularly. I'll be grateful if you make a detailed video on gerund and participle.

[@user-zq3bq7jk3r]

Not gerg😂

[@sunkaraeliya2889]

Greg!that's bloody brilliant!

[@shahidkhan-bi5ig]

In my view this is the best channel for us to learn grammatical English with dear Greg and thank you very much for making such wonderful videos love and respect from Pakistan Peshawar

[@ekaterina7167]

Thank you a million! It is a wonderful lesson. 🤗😀

[@slowlearner4341]

I certainly enjoyed this video, Greg. And I definitely need / have / should / to repeat this action. "Repetitio est mater studiorum". Especially for people who's learned slowly. Thank you.

[@pufulita]

The best explanation on this topic!Thanks!

[@galvaoalb]

Always perfect. Best regards!!

[@ashaocean7431]

Hi Greg It’s very hard to understand this lesson but I want to listen when I have time. It’s very interesting lesson for me . Keep it this Video for me . I am not expert about computer but I am learning

[@maryam4851]

perfect it was really helpful thank you so so much

[@user-ey8yy6wr5c]

What’s up, Greg. Your youtube channel is a discover for me. Thank you 🙏

[@raf9121]

Hi, Greg, we use in past Should ( debía o debería) and present simple web use must ( debo, debes, debe ....)

[@nadiyanadi182]

Great video from you Grey 👍, as i have difficuties to speak english fluently so, i should have followed lesson given by you.

[@gwardek6556]

When Robert Kubica teach You English :)

[@Maggie-yj1hn]

teaches😉

[@user-pc5ri9un3w]

​@@Maggie-yj1hn😊😊😊😊😊😊😊😊😊😊

[@emanmahmoud9439]

Great explanation 👍

[@LinoVern]

Thank you very much Greg!

[@anamahmed7567]

It's a great Chanel . I always try to watch the Chanel .

[@dmitryerin5131]

Hello Greg, could you please explain the deference among negative prefixes: mis- , dis-, ir-, and demi-, semi- as well? Thank you.

[@peterjohnson4244]

HI Greg thanks for help me out of confused of the two must and have to cheers

[@user-yu2iv2oq4d]

Thank you Very interesting lesson!

[@mariasogen7890]

Thanks for sharing English skills. 👍

[@godsonhauser3494]

APPRECIATION FOR YOUR VIVID EXPLAINATION . NICE 👍LECTURE

[@dheerajsinghnagdali]

You have excellent communication skills

[@franciscojose6496]

Great channel great lesson of course your channel are is very important

[@panszarlotka]

Please don't change the video convention anymore - this is absolutely perfect. Definitely world-class, professional level. The video is not distracting by the fountains and allows you to focus 100% on the lesson. I am very glad that you are doing what you are doing. I have 98-99% understanding and I am a b1 / b2 student. The only thing I would suggest are the subtitles on the left side of the screen, not on the right. But that's probably a personal preference. Maybe if you drive cars the other way round, it suits you better. ;) Good luck.

[@nguyenhoangMM]

The subtitle can be placed wherever you like by dragging it with your mouse.

[@gioc.1908]

A tremendously useful video! Impressive!

[@incognito.t]

Очень доходчиво! Спасибо!

[@TheRichExplorer]

Is the difference between must and have regarding obligations restricted to American English? Cos according to Michael Swan's, Have to is usually preferred for regulations and orders from other people cos the obligation comes from the "outside" while in Must the obligation most often comes from the speaker in statements (and the listener in questions). For example, I must stop smoking. (I want to.) Vs I have to stop smoking. (Doctor's orders)

[@hello-mynameis]

Hello Greg, I love your videos ❤ thank you :) I am an English teacher and am going to share this one with my students in this week's newsletter. It is a particularly tricky topic for Italians as they use the identical phrase for both 'mustn't' (prohibition) and 'don't have to' (absence of obligation) making it necessary to understand the context. Your video explains everything very well, however I would appreciate clarification on 1 point you made on ‘must not’ as related to probability/speculation, because it goes against what Cambridge considers correct for their exams... The opposite of 'must be' / ‘must have been’ (certainty) is 'can't be' / ‘can’t have been’ (impossibility) - and not, as you have stated, ‘mustn’t be’ / ‘mustn’t have been’. (Even though, as a native speaker, I used these forms too until I began preparing students for Cambridge exams.) According to Cambridge, 'must not + verb’ is only used in the present for prohibition. Instead 'can’t + verb’ / ‘can’t have + past participle’ is used for probability and speculation to express an impossibility in the present and past. You go to a friend’s house you ring and no one answers - You could say: ‘They must be out.’ / ‘They can’t be home.’ / ‘It must be that they aren't home.’ But according to Cambridge it is an error to say ‘They musn’t be home.’ You went to a friend’s house you rang and no one answered - You could say: ‘They must have been out.’ / ‘They can’t have been home’ / ‘It must be that they weren't home. But according to Cambridge it is an error to say ‘They musn’t have been home.’ Help? :)

[@EnglishWithGreg]

😂 Bingo! When I was a 20-year-old teaching English for the first time in France, I taught this to my class, and the French teacher stopped me and corrected me in front of everyone. The way she did it made me felt really stupid, and I’ve never forgotten this bit of grammar. So yes, it would appear that Cambridge consider this to be wrong. However, I’ve always preferred to teach what people actually say rather than what Cambridge tell us we should say. And you most definitely hear “They mustn’t be home” etc. Thanks for commenting 😊

[@hello-mynameis]

@@EnglishWithGreg hahaha perfectly illustrates one of the reasons I live in Italy and not France ;) Being an amurican native speaker (and therefore insecure;) preparing Italians for Cambridge exams, I prefer to look to Cambridge as an authority, but I love what you've got to say🤗 cheers!

[@sallygard63]

I absolutely agree HELLO-MYNAMEIS ….. I’m an English teacher to foreign students here in Italy … I’ve been teaching for 30 years and we do NOT use ‘must’ in the way he is explaining! Also, I must add, we always teach that in obligation ‘have to’ is used for rules , regulations & laws. The obligation comes from an external font … “YOU HAVE TO WEAR A SEAT BELT …. IT’S THE LAW” Whereas “must “ is used as a personal obligation coming from the speaker “I MUST WASH MY HAIR TONIGHT” “WE MUST PAY OUR GAS BILL THIS WEEK” Must is also an imperative …. so an obligation coming from a parent or teacher. “ YOU MUST CLEAN YOUR ROOM” “YOU MUST STUDY HARDER” Sorry! I like the way Greg explains … by all means … but I strongly disagree with the explanation regarding ‘must’ !

[@MariaFoscaZorzo-lw5xf]

Amazing teacher

[@alexandrearaujodecarvalho]

Thank you so much.

[@SarmmmMm3]

Hi I have watched many of your videos. Your videos are very easy to understand. I always be confused about Singular and Plural words such as everyone, everything, anything, something, someone, ... etc. and also a few, a little, a lot, lot of, few of, ... etc. need (s) or not. Thank you

[@marisacaracuel3460]

Hi everybody! Very interesting topic, vídeo Thank you dear! 😁💫

[@Disciple1963]

Thanks Greg!

[@preetsonone3338]

Hi Garg nice explanation

[@andreagiraldomdphd.8376]

Splendid lesson ! The difference between must and have to is : using “ have to” when you have no choice you have to do that. Is that correct ?

[@nishagayani1640]

Thank you sir

[@gianpierocostamagna9934]

Thank you.

[@tomek3633]

The "must not" part is very difficult for german speakers. Nowadays, when we use the german equivalent to "you must not" (du musst nicht), it does NOT mean "it is forbidden" but instead it means "it is not necessary". My grandparents generation on the other hand used it the other (=the british) way, so it seems that this has changed over the last 50 years.

[@franciscojose6496]

Great lesson now

[@user-lp3nz4cz9n]

Thank you for useful lessons! I tried to download your worksheets but never received on email 😢

[@RedaZaidat]

Hi Sir I 'm trying to prepare for the C2 cambridge exam. I have difficulty with the writing task. So practical examples( not just theoretical knowledge, not the format itself of each) of articles, reviews,letters on various topics would be very helpful.How can we prepare for these tasks, how to select ideas.....the best way to improve in this regard and be ready in the day of the exam for any challenge faced with. I don't know if you got my point My regards

[@juandedios757]

Gracias señor

[@syedsahab5438]

Hi Greg how r u doing?? Any video on PAST MODELS pls. Must have, should have, could have, would have might have etc pls

[@EnglishWithGreg]

Yes! There’s a link to that video in the description 👍🏼

[@alexandrearaujodecarvalho]

That's just what I need.

[@soulefb4219]

what about 'must be ' meaning deduction as well as 'should 'in the past expressing complaint?

[@george7241]

Ηi Greg. Could you make a video about the difference between «by» and «from»? Τhank you in advance.

[@alexandrearaujodecarvalho]

Don't give up the fight!

[@solomonhailemariam9810]

Realy nice .

[@starmoha971]

Your language really very nice!

[@mehmetberisha3681]

... excellent ...

[@yosef-yosef9414]

this is the topic that i'm looking for. About "must" i confuse about this word

[@monarou3084]

All that is cristal clear! Very well explained and easy to understand to a French English learner! 230792

[@user-lx4ox9yx2i]

Thank you for clear explanation. They should have gone to the son's birthday party. I appreciate that. Thumbs up! Cheers!

[@islamsignals]

Greg, all my reservations are now gone. Thanks for your presentation

[@johanglaisner8101]

Could you tell me the difference between may and might. And how can i use ought ?

[@loadedenglish9173]

Ought is similar to should. Ought is not very common and can sound a bit pretentious.

[@senseieueev960]

Thanks

[@miladark9964]

Dear Greg! Then how to say I did not have to do smth in the past - when it was forbidden? Just use the phrases like smth was banned , was not allowed or it was forbidden???? Many thanks!

[@myhome9185]

Have a special way of teaching

[@holahopper]

I sometimes hear or read "I must go" which is not about regulations.

[@gorgi7302]

The best

[@alexandrearaujodecarvalho]

You are welcome.

[@marekc4572]

Greg, in one of your video lessons you suggest listening to music, songs in English. Well, I've been doing it for years. I began when I was a teenager, years before the internet, where you can find lyrics of every song you can imagine. So, should + have + p.p? And in my head immediately pops up this example. I wonder if you recognize the song without Google :) I should have known better with a girl like you That I would love everything that you do And I do, hey, hey, hey, and I do...

[@OnE61811301]

What would be the difference between "must not" and "may not"? I've heard "may not" in the smoking example - "You may not smoke in the room".

[@jitendrarajpoot5211]

Nice

[@samaamas3659]

First thanks a lot. Can you make a video how to use “I would have had ….” And “I have had …..”, please

[@isoldetraumuller7345]

This lesson was very difficult for me!

[@liliu6563]

Thank you. Gerg. But I'm confusing about the explanation. Because some other Videos say: have to rule and must is necessary. Now I don’t know which one is right. 😢

[@tribalwildling9926]

In British English, is it not "Practise" (verb) not "Practice"?

[@christopherfairs9095]

Yes - you are correct.

[@Baliverna]

Is it correct to say that "must" used with "you" is an order given, and used with the other persons is something the the subject personally wants?

[@gianpierocostamagna9934]

I must have a pill for speacking English like you.

[@alexandrearaujodecarvalho]

Congratulations.

[@abdelkrimkadi5424]

What difference between these is and this is ? Thanks

[@hello-mynameis]

The correct forms are: These ARE/ This IS - THESE is plural and THIS is singular - they are sometimes confused because people make the error of pronouncing them both the same, but THESE is pronounced 'THEEZ' with a long E vowel and a Z, and THIS is pronounced 'THIS' with the schwa sound and S :)

[@shaoranli77]

what is the true meaning of "spare"? because it has many meanings, depending on the sentence

[@MoreChannelNoise]

I find this one difficult because in common practise hardly anyone follows these rules so whats the point. They are used interchangeably and hardly anyone says "you must not smoke in here" but instead "you cant smoke in here" or your not allowed to smoke in here

[@tatyanagorobtsova]

Absolutely agree

[@MoreChannelNoise]

@@tatyanagorobtsova I wouldn't want to teach this to a class because they will go outiside and hear people saying whatever they like lol

[@user-kq7pu3fm7e]

I need pdf of this lesson

[@saqibninja6307]

Haha 🤣 I appreciate it Sir absolutely approximately understand enough of but when I will watch again This video so I hope that I would be understanding so stay happy forever ♾️ and thanks 💟👍 Sir 😗

[@Jesusisallforme]

Thanks a bunch for video! And i also heard from Paul Washer (american missionary, preacher): "You've got to believe in Jesus..." As i understood that means .. You MUST believe.. If it's not difficult Greg answer it this way or not?

[@yunfengfan3705]

Hi Greg, a few days ago I came across a sentence “ If I started getting into it at 27, probably by the time I was 29, I was at a very high intensity level.” , which was used by a lady talking about her past in an interview . The “if” clause here looks like a subjunctive clause, but I think it’s not. Could you please tell me whether I’m right or not? I’m quite confused, because before I stumbled across this sentence, I thought all “if” clauses in past tense are subjective . Need your help, thank you.

[@Allan_son]

English speaker. I have no idea how to parse that quotation. I suspect the speaker started talking before she knew what was going to say. It looks like a strange IF - THEN structure. My recommendation: forget that you saw this.

[@cheesengchin4525]

TQ

[@wickedsick110]

Hi, Greg, and thanks for the explanation. It seems they taught us a complete rubbish back in school days. Or perhaps you could kindly explain. We were taught "have to" covers obligations, while "must" covers rather "moral" obligations. Better explained on example, "I have to do my homework" means (was supposed to mean) that I was ordered to do my homework (not exactly a "rule", but based on your explanation, you'd use "must" there instead, right?), while "I must do my homework" means I need to do my homework, voluntarily, therefore I have no free time for example (I guess you'd use "need to" as I did in the explanation? Or still "must"?). Does the difference we were taught make any sense?

[@lovelysinichka4532]

'I have to do my hw' almost equal to 'I must do my hw'. Have to - you're obliged to do sth, must - because if rules, regulations, norm etc: You must keep silent in the library but You have to leave earlier (otherwise, you'll miss the train)

[@wickedsick110]

@@lovelysinichka4532 Thanks. So actually anything I decided to do (as well as I was ordered to do) is "have to", except when my decision coincidentally match some general rule? If I'm ordered to leave the place by an officer, do I have to leave or must I leave?

[@lovelysinichka4532]

@@wickedsick110 you seem to be a perfectionist as I am) As for your example, I'm pretty sure BOTH variants are possible! In questions like 'Must I...?' it sounds archaic, thus Do I have to...? is appropriate. In affirmations both are used

[@andrzejzborowski4920]

There is a Polish guy on KZbin who is English native speaker (born in Poland but moved to the USA when he was a child so he speaks like a native) who claims that the people shoud not use "must" at all. That they always should use "have/has to". He grew up in Philadelphia so I think it might have had some effect on him. Perhaps they don't use there or rarely use "must"??

[@user-bu7rl4ts4m]

Greg, did you explain somewhere here such crazy things as: the infinitive,the infinitive constructions, the participle and the participle constructions, the gerund? These are all pretty crazy issues and it`s quite difficult to deal with them on your own. Or may be does your another advanced course contain all that stuff, I mean the course on WhatsApp?

[@gretabaumann6231]

If it had not been for, what is mean?

[@jokjokah-cj3yy]

Can you do the transilation in arabic?

[@h7.-Z]

صح

[@nitinchaturvedi3880]

Hii sir could you plz make a video on full uses of can , could any more i mean full uses of modal , sometimes I don't get it why could uses like this, you could say what does this mean plz make a video on this topic sir because nobody can explain like you do you always cover all uses

[@GalaxyBro315]

9:40 hahahahaha!

[@holalavida6207]

Must means deduction too😊

[@kheyre1694]

Teacher i need this pdf i write my gmail then its not download or not entered my ducoment

[@GalaxyBro315]

also can use Mustn't

[@peterwilliams942]

In American English, MUST is very rarely used for obligation unlike British English.

[@Allan_son]

For me, a Canadian, I think "must" is stronger. "The professor says we have to hand in the project tomorrow." might be used for a relatively minor deadline. In contrast: "we must hand in the project tomorrow or we will fail the course, no excuses allowed."

[@user-cl9ue3jl9p]

Hi Greg! Do you think you could explain why you didn't mention 'I can't/couldn't have had the right number' instead of 'I mustn't have had' for probability in the past or 'It can't/couldn't have been his brother'? Aren't these more British? I'd be eternally greatful if you would answer.

[@MacXpert74]

"I couldn't have had the right number" means that it wasn't possible for you to have the right number. That's something different than saying "I mustn't have had the right number", which means you think you probably didn't have or use the right number.

[@MacXpert74]

To explain further: If for instance the phone number you wanted to call should have 10 digits, but the number you wanted to use only has 8 digits, then you could say; "That couldn't have been the right number", because it's not possible for it to be the right number with only 8 digits. But if the number you called does have the right amount of digits, and therefore is a possibly correct phone number, but it just didn't connect you with the person you were expecting, you could say: "That mustn't have been the right number" or "I must have had the wrong number".

[@user-cl9ue3jl9p]

@@MacXpert74 Hi! I'm araid I can't agree with you. 'I couldn't have the right number' means that it wasn't possible for me to have the right number. For example, somebody wouldn't give it to me or due to certain circumstances there was no possibility for me to get it. In a different context 'I couldn't have the right number' can also mean it would not be possible for me to have the right number. But 'I couldn't/can't have had the right number means that the number must have been wrong - the same as 'I must not have had the right number'.

[@user-cl9ue3jl9p]

@@MacXpert74 In this situation you can also use the three variants: ‘That can’t/couldn’t/mustn’t have been the right number’ as well as ‘I can’t/couldn’t/mustn’t have had the right number’. It doesn’t really matter wether the number was wrong because of the wrong amount of the digits in it or the digits themselves were wrong.

[@MacXpert74]

​@@user-cl9ue3jl9p "'I couldn't/can't have had the right number means that the number must have been wrong - the same as 'I must not have had the right number'. Sorry, but no that is not the same thing. If you would like to use "couldn't" in the way you mean it, then you should say: "IT couldn't have BEEN the right number". If you use 'I couldn't have had' in that sentence you're saying that it's not possible for you to have had the number in the first place, which is fundamentally different from saying that you just had the wrong number or dialed the wrong number.

[@jaceklitawa]

Shouldn't " can't " be used instead of "mustn't" in strong past probability?

[@sebahattinkose4784]

He must have got a lot of wine. He must have fainted. Loves from Türkiye.

[@damlaozdemir2404]

How would you say “smoking was forbidden in a cafe, but now it is not forbidden.” Is this ok? “You must not smoke in this cafe last year/yesterday”

[@EnglishWithGreg]

Hi friends 👋🏻 Here’s the link to the free worksheet + test! I hope you benefit from this new addition to English with Greg! free.englishwithgreg.com/ … Let me know what you think! ⤵

[@nissanoussa3640]

Hi, Greg the page is not available!

[@EnglishWithGreg]

@@nissanoussa3640 Sorry! It should work now. If not, go here instead: onlinelanguageacademy.lpages.co/free/