英語高頻考點(diǎn)：it的用法

2019-05-22 11:03:03網(wǎng)絡(luò)資源

　　1、It除了代替人和物以外,還可以作形式主語.而真正的主語(不定式、動(dòng)名詞或從句)則放于謂語或表語之后.

　　例如：It is nor easy to finish the work in two days.

　　然而有少數(shù)表語之后接動(dòng)名詞作真正的主語.這些表語是：無助(no help)、無用(no use)、沒好處(no good)；工作(hard work)、費(fèi)時(shí)(a waste of time)、又危險(xiǎn)(a danger).

　　例如：A、It is no use crying over spilt milk.

　　B、It is a waste of time waiting for him．

　　2、It還可以作形式賓語.通常下列動(dòng)詞后面可接it作形式賓語：2f2tcjm(find,feel,think,take,consider,judge, make).

　　例如：A、He made it clear that he was not interested in this subject．

　　B、I think it no use arguing with him.

　　3、It用于強(qiáng)調(diào)句式.要強(qiáng)調(diào)句子的某一部分(主語、賓語、狀語),可以把it當(dāng)作先行詞.這種句子的結(jié)構(gòu)是：It is(was)+ 被強(qiáng)調(diào)部分+that(who)+句子的其余部分.

　　例如：A、It iS Professor Lin who teaches us English—(強(qiáng)調(diào)主語)

　　B、It was in Shanghai that l saw the film.—(強(qiáng)調(diào)狀語)

　　C、It was in 1990 that I worked in the factory．(同上)

　　但要注意與定語從句的區(qū)別.

　　例如：D、It was 1990 when I worked in the factory．(定語從句)

　　在強(qiáng)調(diào)句式里,我們把強(qiáng)調(diào)結(jié)構(gòu)It is(was)…that除去,句子還很完整.如例句C.而例句D就不能.