高考英語復習指導：It作人稱代詞的用法

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　　1、it代替前面(或后面)的單數(shù)名詞或分句等所表示的事物。

　　e.g. You cannot eat your cake but have it.(it代替前面的cake)

　　Although we cannot see it, there is air all around us. (it代替后面的air)

　　They say he has left town, but I don't believe it. (it代替前面They…town分句中的情況)

　　2、代替有生命但不能或不必分陰陽性的東西(包括嬰兒)。

　　e.g. Yesterday we saw a big tree. It was fully twenty metres high. (it代替前面的tree)

　　The baby cried because it was hungry. (it代替前面的baby)

　　3、在某些習慣說法中，可以代替人。

　　e.g. ---- Someone is knocking at the door, Peter. ---- Who is it? ---- It's me.

　　---- Who are singing? ---- It is the children.

　　---- The light is still on in the lab. It must be the third-year students doing the experiment.

　　4、it與one的區(qū)別：這兩個詞都可以代表前面說過的名詞，但it用于同名同物的場合;one則用于同名異物的場合。

　　e.g. ---- Do you still have the bicycle? ---- No, I have sold it.

　　---- Is this knife yours? ---- No. It is Xiao Zhang's. Mine is the one on the desk.

　　5、it與that的區(qū)別：兩詞都可代替某一特定名詞，但that指同一類，并非同一個。

　　e.g. The climate of South China is mild(溫和的); I like it very much.(it指the climate of South China)

　　The climate of South China is much better than that of Japan.(that指the climate)

　　(責任編輯：郭峰)

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