A-an are used before a singular and countable nouns.

A is used before consonants ( b, c,d,f,g,h,…)

An is used before vowels. (a,e,u,o,i)

a pencil an apple

a book an engineer

a teacher an inspector

*** There are some exceptions to this rule:

a an university a an European city

an a hour an a heir

an a honest child a an universal issue

I am reading a book about music. People must read a books .

She is eating an apple. She likes a apples

I drink milk everyday.

Time is very important.

You need to have experience for this job.

Coffee is a popular drink