that的复数形式those，that的意思是：那个，那多么，如此…以至，用于某些动词、形容词和名词后，引出各种从句，其用法如下：
1、（指较远的人或事物）那，那个
used for referring to a person or thing that is not near the speaker or as near to the speaker as another
Look at that man over there.
瞧那边的那个男子。
How much are those apples at the back?
后边那些苹果什么价钱？
2、（指已提到过或已知的人或事物）那，那个
used for referring to sb/sth that has already been mentioned or is already known about
I was living with my parents at that time.
那时候我和父母住在一起。
That incident changed their lives.
那次事件改变了他们的生活。
Have you forgotten about that money I lent you last week?
你忘记上星期我借给你的那笔钱了吧？
That dress of hers is too short.
她那件连衣裙太短了。
3、（指较远的人或事物）那， 那个
used for referring to a person or thing that is not near the speaker, or not as near to the speaker as another
