指示代詞包括this， that， these， those 和such，在句子中可以作主語、定語、表語、賓語等(such不作賓語)。

　　that和those有時分別用來代表前面提到的不可數(shù)名詞和名詞復(fù)數(shù)，以避免重復(fù)。而可數(shù)名詞單數(shù)往往用the one 或that one 來代替。用the one 的時候更多一些。如：

　　These machines are better than those we turned out last year. 生產(chǎn)

　　The oil output of this year is much higher than that of last year. 產(chǎn)量

　　The best wine is that from France。

　　My room is lighter than the one next door。

　　Ill take the seat next to the one by the window。

　　The film is more funny than that one。

　　that 可以指上面提到的事情，this指下面要談的事情。如：

　　They have no time to read the books. Thats their trouble。

　　She was ill yesterday. Thats why she was absent。

　　I want to know this： How much money we have left?

　　What I want to say is this： Pronunciation is very important in learning English。

　　this 和that 有時還可以用來表示程度。如：

　　I dont want that much。

　　He is not that wise。

　　The book is about this thick。