'A' and 'an' are used when we speak of a countable thing for the first time.
Example:
A tiger was here just now.
The tiger was fierce.
'Some' is used with countable or uncountable nouns.
Example:
There are some salt.
There are some people in the room.
In this live workheet, choose whether to use 'a' , 'an' or 'some' in the sentences.
