What's the difference between English a and an?

In English, words have many uses. Let me sort out the usage and differences between a and an for you:

Differences in usage

A is used to pronounce letters or words that begin with consonant phonemes.

For example: a pen, a pen, a book, a book.

In a language, pronunciation begins with a vowel phoneme before a letter or word.

For example: an apple, an orange, an egg and an English book.

How to distinguish usage?

Use an before vowels and a before others.

Vowel letters: a, e, I, o, u.

Many people will fall into the misunderstanding of this kind of problem, thinking that when they see A, E, I, O and U, they should use the indefinite article an, otherwise, they should use A, which is wrong. In fact, I think so after high school, hehe!

The correct understanding should be when the pronunciation of a single letter or word begins with a vowel (PS: this word is very subtle, so it is still a bit difficult to distinguish "pronunciation begins with a vowel" by paying attention to understanding and practicing more.

It doesn't matter, people with average IQ like me can win, so you young people have no problem! ) use an, otherwise use a, it can be said that when using an, it has nothing to do with the appearance of vowels.

Use a before consonants; An is used before vowels. Generally speaking, vowels are vowels and consonants are consonants.

What should I pay attention to when using a and an?

(1) Spell words that start with consonants but start with vowels.

Although the spelling of hours, honesty, honor and other words begins with the consonant H, their pronunciation begins with vowels, so they should be preceded by an.

(2) Spell words that start with vowels but start with consonants.

Although useful, the spelling of words such as University, United, European, One-eyed, One-way, etc. starts with vowels, but their pronunciation starts with vowels, so one should be added before them.

(3) Of the 26 English letters, 12 letters A, E, I, O, F, H, L, M, N, R, S and X start with vowels, and the pronunciation of other letters starts with consonants.

example sentence

An example

A person is as old as he feels. ?

A person is as old as he feels.

Everything is fine with a happy ending. ?

It would be nice to have a happy result.

An example

This? Unit? Is it? Now? Ann? Established? Part? Yes? That? Sure. ?

This unit is now part of this course.

we? Consider? This? Agreement? Where to? Is it? Ann? Does it matter? One step? Forward. ?

We believe that this agreement is an important step forward.