that的用法：
1.that 代词，与this对应。如：That is his mother.
2.that引导定语从句。例如：I bought a book that is quite popular.
3.that 引导名词性从句，如定语从句。如：He believes that money can not buy happiness.
3.
that的用法：
1.that 代词，与this对应。如：That is his mother.
2.that引导定语从句。例如：I bought a book that is quite popular.
3.that 引导名词性从句，如定语从句。如：He believes that money can not buy happiness.
3.
