代詞it的基本用法it

1、C- 代詞 it 的基本用法知識(shí)梳理代詞 it一.it 用做人稱代詞的用法it 用作代詞，意為 “它”，既可以指人，也可以指物。it 做人稱代詞，可以用來(lái)代替一個(gè)名詞、短語(yǔ)、從句或句子，以避免他們?cè)诰渲械闹貜?fù)。這是可以指提到過(guò)的，也可以指未提到的，在句中做主語(yǔ)、表語(yǔ)和賓語(yǔ)。1)指事物， it 可以指除人以外的任何事物或動(dòng)物。I dropped my watch and it broke.我把手表掉在地上摔壞了。2)指人， it 主用用于指性別不明的嬰兒或只聽(tīng)其聲不見(jiàn)其人的人，如：Is it a boy or a girl? 是男孩還是女孩？There is a knock on the doo

2、r. It must be the postman.“ Listen.Someone is crying. ”“ Oh,it must be Mary. ”3）代替某些代詞。代詞 it 可以用于代替指示代詞this, that 以及復(fù)合不定代詞something, anything, nothing 等，如：“ Whatthis? ”“ It a snew machine. ”二.it 用作非人稱代詞的用法1)it 用作非人稱代詞用來(lái)指時(shí)間、距離、價(jià)值、天氣、氣溫及溫度等。如It toos late to go there now.現(xiàn)在去那已經(jīng)太遲了。It rained all day yes

3、terday.昨天下了一整天雨。2)用于某些句型。It times for sth. 該做某事了。It times to do sth. 是時(shí)候該做某事了。It times for sb to do sth. 某人該干某事了。精選文庫(kù)It (about/high)s time +that-從句。某人該做某事了。It first(second)time +that-從句。某人第幾次干某事。 （從句謂語(yǔ)動(dòng)詞用現(xiàn)在完成時(shí)）It +s時(shí)間段 +since 從句。自從以來(lái)有一段時(shí)間了。It +s時(shí)間段 +before 從句。過(guò)多長(zhǎng)時(shí)間才三.it 用作形式主語(yǔ)的用法。1)當(dāng)不定式、動(dòng)名詞、從句等復(fù)雜成分做

4、句子主語(yǔ)時(shí)，為保持句子的平衡，通常把真正的主語(yǔ)放在句末，而句首使用形式主語(yǔ)it 。 如It verys important to remember this.It hards work climbing mountains.It unknowns when he willcome.2)it 用作形式主語(yǔ)的重要句型： It+be+adj.+for(of)sb to do sth. 某人做某事是 的It is hard for him to make up his mind.他很難下定決心。It was foolish of her to say such a thing.她說(shuō)那樣的話，太愚蠢了。

5、提示：此句型中的介詞 of 和 for 的區(qū)別是： of 用于指某人的性格，屬性，特征等。介詞 for 表示對(duì)象，意為 “對(duì) 來(lái)說(shuō) ”。 It takes/took sb+時(shí)間段 +to do sth.某人做某事花了 時(shí)間。It took me two hours to finish my homework. It is up to sb to do sth.該由某人做某事了。It ups to you to make the choice.該由你來(lái)做選擇了。It looks(seems,appears,happens,occurs)that (as if) 似乎 It seems as th

6、ough he didn recognizet me.四.it 用作形式賓語(yǔ)的用法。1)當(dāng)不定式、動(dòng)名詞、從句等復(fù)雜成分用作賓語(yǔ)且后面跟有賓語(yǔ)補(bǔ)足語(yǔ)時(shí)，通常會(huì)在賓語(yǔ)補(bǔ)足語(yǔ)前使用it 作形式賓語(yǔ)，而將真正的賓語(yǔ)移至句末。其基本結(jié)構(gòu)為 “動(dòng)詞 +it+ 賓語(yǔ)補(bǔ)足語(yǔ) +不定式（動(dòng)名詞或從句）”。I find it difficultto do the job well.-2精選文庫(kù)I think it best that you stay here.We think it no use complaining.2)用作形式賓語(yǔ)的幾個(gè)特殊結(jié)構(gòu)：動(dòng)詞 +it+that-從句I think it (tha

7、t) he willcome on time.動(dòng)詞 +it+when(if)- 從句We really appreciate it when she offered to help.動(dòng)詞 +prep.+it+that-從句I cananswert for it that he willcome.我不能保證他會(huì)來(lái)。動(dòng)詞 +it+ 介詞短語(yǔ) +that-從句I took it for granted that he would help us.五.it 在強(qiáng)調(diào)句中的用法。強(qiáng)調(diào)句的基本結(jié)構(gòu)是： It+be+ 被強(qiáng)調(diào)部分 +that(who)+ 其他部分。能力提升單項(xiàng)選擇1.It was at the

8、 gate _ he told me the news.A. thatB. whatC. whichD. when2.Is _necessary to tell his father everythingA. itB. thatC. whatD. he3.Was it in this palace _ the last emperor died?A. thatB. in whichC. in whereD. which4.Is _ possible to fly to the moon in a spaceship?A. nowB. manC. thatD. it5.Was it during

9、 the Second World War _he died?A. thatB. whileC. in whichD. then6.Is _necessary to complete the design before National Day?A. thisB. thatC. itD. he-3精選文庫(kù)7.I don't think _possible to master a foreign language without much memory work.A. thisB. thatC. itsD. it8.Does _matter if he can't finish

10、the job on time?A. thisB. thatC. heD. it9.It was not _she took off her dark glasses _ I realized she was a famous filmstar.A. when; thatB. until; thatC. until; whenD. when; then10. Tom s mother kept telling him that he should work harder, but _didn t heA. heB. whichC. sheD. it11._is a fact that Engl

11、ish is being accepted as an international language.A. ThereB. ThisC. ThatD. It12. Is _ possible to fly to the moon in a spaceship?AnowB manCthatD it13Our food and service are better than _ used to be.AitBweCtheyD them14_ appears to me _ the report must be true.AThat; itBIt; thatCIt; itDThat; that15H

12、e feels _ duty to help others.Athat heBthat hisCit heDit his16Take _ easy. The roads are icy詞.(典 不緊張 ; 松懈 ; 不生氣 ; 不激動(dòng) )A itB themCusDyou17_ was _ who I met in the museum this morning.A It; himBIt; heCThat; heD. That; him18 Have you found the bike you lost yesterday? Yes, I've found _ already.Ait

13、B thatCthe oneDthat one19.Someone is at the door, who is?A. thisB. thatC. itD. he20.It is raining cats and dogs.-4精選文庫(kù).A. So it isB. So is itC. Neither it isD. Neither is it小結(jié)C- 含 it 的 9 個(gè)常用句型知識(shí)梳理1. It doesn t matterIt doesn t matter what he says他說(shuō).什么都沒(méi)關(guān)系。2. It appears/ seems/ happens/says thatIt se

14、ems that he is always correct他.好像總是對(duì)的。It happened that I had no money with me.碰巧我當(dāng)時(shí)沒(méi)有帶錢(qián)。3.It is said/ reported/ believed/ understood thatIt is said that he has joined the Party據(jù).說(shuō)他已經(jīng)入黨了。4. It is a waste of time /money doing sth.It s a waste of time your talking to him你.和他談是浪費(fèi)時(shí)間。5.(It is) no wonder( that)It s no wonder he is not hungry;hashe been eating sweets all day.難怪他不餓，他整天在吃糖果。6. It makes no/mush differenceIt s doesn t make much difference my being我there在不.在那兒沒(méi)有什么影響。7. it takes sb. some time to do sth.It took me near