Question

this/that，these/those 怎么用？

Answer 1

This 这个
That 那个

these 这些（不止一个）
those 那些（不止一个）

This is my apple. 这是我的苹果。
That is his pear. 那是他的梨子。

These are my apples. 这些是我的苹果。
Those are his pears. 那些是他的梨子。