单数句变复数句,复数句变单数句1He is his friend.2Those are boxes.3 These are desks.

问题描述:

单数句变复数句,复数句变单数句1He is his friend.2Those are boxes.3 These are desks.

1He is his friend.They are their friends.
2Those are boxes.That is a box.
3 These are desks.This is a desk.