When should we use "A" and "An"? (A Brief Overview of A and An)

You cannot even learn how to properly use nouns in a sentence without understanding the differences between when to use "A" and "An" because it is so important to know about how to say 'A' or 'An' depending on the first letters of the nouns. Whether the first letter of the noun, in particular, is a vowel letter or even a consonant letter, you will easily know what makes "A" and "An" so unique from each other.
If you can also remember the different types of nouns that I have discussed before, then it would also be much better if you could learn first how you can differentiate nouns by either person, place, thing, or animal because I will also show to you some common objects that you would often see around your environment or even in your own house. If you want to watch one of my previous videos on the basics of nouns, then I will also leave the link in the description down below.
Don't Forget to Review All of the Different Vowel and Consonant Letters along with their respective sounds because we will also review the English Alphabet again in this video for those who haven't watched my previous video about "LETTERS" yet. Suppose you have watched my English Alphabet Tutorial Video along with the differences between vowel and consonant sounds. In that case, you can just go ahead and jump straight to this video if you have already mastered the different letters of the alphabet by now.
If not, then the video that I have uploaded in the past about the basics of English Letters is still available to watch. Video Link is in the description down below if you want to check it out again.
Video Links:
1. The English Alphabet (And the Differences Between Vowel and Consonant Letters): • The English Alphabet (...
2. The Basics of Nouns Tutorial: • The Basics of Nouns (B...
If you have any other further questions about the lesson then you may leave all of your questions in the comments down below and I will answer all of your questions as best as I can even through my busy schedule. I would highly appreciate it if you could also give the video a like if you have gained new learnings from this video and be sure to subscribe to my channel to show your support and your love for the channel so that I can keep on making more English Tutorial Videos like this one because it truly keeps me motivated to educate ESL students online from around the world who really need to learn English as a Second Language.
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That will be all. Thank you all so much for Watching this Video and Happy ESL Learning to All of You.