代詞it的用法
人稱(chēng)代詞it可以用來(lái)代替一個(gè)名詞、一個(gè)短語(yǔ)、一個(gè)從句或一個(gè)句子，以避免它們?cè)诰渲械闹貜?fù)。以下是由學(xué)習(xí)啦小編整理關(guān)于代詞it的用法，提供給大家參考和了解，希望大家喜歡!
代詞it的用法
(一)
it的用法主要體現(xiàn)在以下幾個(gè)方面：作為人稱(chēng)代詞的it，先行代詞的it，非人稱(chēng)代詞的it以及強(qiáng)調(diào)句中的it和it的一些習(xí)慣用法。
1. it指代事物、群體、經(jīng)驗(yàn)、活動(dòng)等。可以代替一個(gè)詞、詞組或整個(gè)句子，以免重復(fù)。
That wasn’t where you had dinner，was it?
If you remember these points，it will help you.
When can we come to visit you?Any time you feel like it.
I love running. It keeps me fit.
it也可指代嬰孩或性別不詳?shù)娜恕?/p>
Do you hear a baby crying?Something must have hurt it.
Who is making so much noise?It must be the children.
Somebody is knocking at the door. I don’t know who it is.
Who is it? 未見(jiàn)具體人，不同于Who is that ?見(jiàn)到具體某人，但不相識(shí)。
2. it用作非人稱(chēng)代詞的主語(yǔ)，表示氣候、天氣、溫度、時(shí)間、地點(diǎn)、距離等或虛指的情境。
It’s Sunday tomorrow.
It’s five miles to the nearest station from here.
It was dull when Tom was away.
It seems that no one would like to help you.
Had it not been for my illness last week，I would have gone with them.
3. it常用作先行代詞
代指不定式，可用作形式主語(yǔ)或形式賓語(yǔ)，以it作形式主語(yǔ)或形式賓語(yǔ)的動(dòng)詞有believe，consider，feel，find，imagine，make，regard，suppose，think等。
It is difficult to learn written Chinese.
It is of great help to master a foreign language.
It took me a week to recite the text.
I find it quite necessary to make some changes.
He thought it best to be on his guard.
代指動(dòng)名詞，可作形式主語(yǔ)或形式賓語(yǔ)，常用在下列句型中
It is no good(no use，useless)+動(dòng)名詞
It is a waste+動(dòng)名詞
代指名詞性從句，該結(jié)構(gòu)中的名詞性從句可用that，when，who等引導(dǎo)。
It happened that they were away.
She wants to make it clear whether you still love her or not.
It is not known what caused the accident.
Has it been found out who is the murderer?
It is believed/known/reported/said/supposed/thought that an egg is the equivalent of one pound of meat. 可轉(zhuǎn)換為An egg is believed/known/reported/said/supposed/thought to be the equivalent of one pound of meat.
另外類(lèi)似take it one’s duty to do something的結(jié)構(gòu)中，think，find，prove，show，deem，believe，consider，count，feel，imagine，make，regard，suppose，take等詞后有不定式作賓語(yǔ)，且有補(bǔ)足語(yǔ)時(shí)，必須用形式賓語(yǔ)it代替不定式，若補(bǔ)足語(yǔ)為動(dòng)名詞或從句，也要用it作形式賓語(yǔ)。
I think it my duty to help her.(=It is thought my duty. . .)
I found it very easy to learn the rules.(=It was found very easy. . .)
We shall leave it to him to settle the matter.(=It is left to him to. . . ，
4. 用于強(qiáng)調(diào)句型中It is(was)+被強(qiáng)調(diào)部分(主語(yǔ)、賓語(yǔ)或狀語(yǔ))+that(who)…。it無(wú)任何指代關(guān)系，也無(wú)實(shí)義。
It was John who(that)wore his best suit to the dance last night.
It was in Shanghai that I first met Jack.
It was because I wanted to buy a dictionary that I went to downtown yesterday.