When do we use A or AN

We use A when the word begins with consonants


A dog
A Cat
A Big apple

and we use AN when the word begins with vowels

An egg
An apricot
An orange

but there is a few exceptions for example if the word starts with a silent "h" then the "AN" is used

An honest mistake

and if the "Y" sounds like "U" or the or the "W" like "O"

then we use "A"

A unicorn

A Union

A used top
                                               Agda da Silva