- 相關(guān)推薦
高中英語(yǔ)語(yǔ)法it的用法
下面是小編搜集整理分享的高中英語(yǔ)語(yǔ)法it的用法，一起來(lái)看看吧。
It用法及其句型和固定搭配，是高中英語(yǔ)語(yǔ)法的重點(diǎn)、難點(diǎn)，又是高考英語(yǔ)的熱點(diǎn)，因此應(yīng)給予充分的重視，現(xiàn)將it用法歸納如下：
一、作人稱代詞
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(yáng)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(xí)慣說(shuō)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(gè)詞都可以代表前面說(shuō)過(guò)的名詞，但it用于同名同物的場(chǎng)合;one則用于同名異物的場(chǎng)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(gè)。
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)
二、作無(wú)人稱代詞it作無(wú)人稱代詞時(shí)，除了句中找不到它所代表的詞語(yǔ)外，另一個(gè)特點(diǎn)是它后面的內(nèi)容都是表示天氣、時(shí)間、距離、度量衡及情況等。
It is fine (rainy, windy, etc.).
It is noon.
It is a half hour’s walk to the factory.
It is eighteen square metres in area.
What does it matter?
三、作強(qiáng)調(diào)詞，構(gòu)成強(qiáng)調(diào)結(jié)構(gòu)用以幫助改變句子結(jié)構(gòu)，使句子的某一成分受到強(qiáng)調(diào)�！癐t is (was) + 所強(qiáng)調(diào)的成分+ that (who) + 其它成分�！痹谶@個(gè)句型中，it本身沒(méi)有詞義。在使用強(qiáng)調(diào)句型時(shí)需注意以下幾點(diǎn)：
1. 請(qǐng)注意強(qiáng)調(diào)句型的特殊疑問(wèn)句例When was it that he changed his mind to take part in the activity?
2. 在強(qiáng)調(diào)原因狀語(yǔ)從句時(shí)，只能強(qiáng)調(diào)由because所引導(dǎo)的從句例It was because he was ill that he didn't come to school yesterday.
3. 在強(qiáng)調(diào)not … until結(jié)構(gòu)時(shí)必須把not與until一起放到被強(qiáng)調(diào)的位置上例It was not until she took off her dark glasses that I realized she was my brother.
4. 注意強(qiáng)調(diào)句型與定語(yǔ)從句的區(qū)別例It was at 7 o'clock that he came here yesterday.( 強(qiáng)調(diào)句型)It was 7 o'clock when he came here yesterday.(定語(yǔ)從句)四、It用作形式主語(yǔ)It替代作主語(yǔ)的從句、動(dòng)詞不定式、動(dòng)名詞，而把真正作主語(yǔ)的從句、動(dòng)詞不定式、動(dòng)名詞置于句尾。
【高中英語(yǔ)語(yǔ)法it的用法】相關(guān)文章：
英語(yǔ)語(yǔ)法build用法08-31
英語(yǔ)語(yǔ)法從屬連詞用法07-26
考研英語(yǔ)語(yǔ)法分詞作狀語(yǔ)用法10-20
as用法10-12
the用法歸納10-15
see的用法06-12
have的用法06-26
考研英語(yǔ)It的用法08-03