A singular noun names one person, one place, or one thing.
A plural noun names more than one person, place, or thing.
You can add a s to most nouns to make it plural.
![grammar1](https://hw-cdn.smrtenglish.cn/smrtenglish.com-cn/core/LMLA/KIDS/ENGL120Kids/unit01/Grammar%201-3/1-3g1.jpg)
I like to read with my friend.
I like to read with my friends.
![grammar2](https://hw-cdn.smrtenglish.cn/smrtenglish.com-cn/core/LMLA/KIDS/ENGL120Kids/unit01/Grammar%201-3/1-3g2.jpg)
There is a light blue house.
There are two blue houses in a row.
![grammar3](https://hw-cdn.smrtenglish.cn/smrtenglish.com-cn/core/LMLA/KIDS/ENGL120Kids/unit01/Grammar%201-3/1-3g3.jpg)
An apple a day keeps the doctor away.
Apples are good for us.