It-的用法總結(jié)

1、It的用法總結(jié)一 代詞：1)指代上文2) 指代 this/that3) 指代未知性別的嬰兒或孩子或身份不明的人4) 指代時(shí)間/地點(diǎn)/天氣/溫度/距離/環(huán)境Whatdoes “it ”referto?1. It getsdarkveryearly in thew in ter.2. Whatwillyoucallit ifit saboy?3.llovespring-It saw on derfultimeoftheyear.4. It slessthan100kilometresfromheretoJinan.5. Whe nthefactorycloses,it willmea n500pe

2、oplelos in gtheirjobs.6. What sthis?It sacat.7. It hassnowedmuchthisyear.注意：it,one和that,those作替代詞的區(qū)別(1) Thebooki ny ourbagisveryi nteresti ng.Ca nlborrow?(2) Thebookinyourbagismoreinterestingthanon thedesk.(3) TheweatherhereismuchcolderthaninNanjing.(4) Thebooksarefree.Youcantakefreeofcharge.(5) The

3、booksinthebagarebetterthan on thedesk.it表示特指，與前面指代的名詞是同一個(gè)one表示泛指，指代單數(shù)可數(shù)名詞，與指代的名詞同類但不同一個(gè)that表示特指，相當(dāng)于the+名詞單數(shù)，與指代的名詞同類但不同一個(gè) those表示特指，相當(dāng)于the+復(fù)數(shù)可數(shù)名詞，與指代的名詞同類但不同一個(gè) t指時(shí)間的幾個(gè)重要句式【句式1 itis/hasbeen+ 段時(shí)間+sinee-自從-多久了? Itis/hasbee n3yearss in ceIvisitedyourcompa ny.【句式2 Itwas+段時(shí)間+before-過(guò)了多久 才-? Itwas3hoursbef

4、oreherealizedthetruth.【句式3 Itwillbe+ 段時(shí)間+before-要過(guò)多久-才-? Itwillbe3m on thsbeforetheycompletethebridge.【句式4 itwas+點(diǎn)時(shí)間+when- 某事發(fā)生于-某一時(shí)刻一 Itwas10 o clockwhenthebigfirebrokeout.【句式5 It/thisis/wasthe+ 序數(shù)詞+time+ 現(xiàn)在完成時(shí)態(tài)/過(guò)去完成時(shí)-（表示某人第幾次做某事）? Itisthesec on dtimelhaveheardofthis.【句式 6】ltistime（abouttime/highti

5、me）thatsb. did /should do（該是干的時(shí)候了）Itistimethatwewe nttoschool.對(duì)比訓(xùn)練1.Itwillbeyearswemeetagain.2.ItistenyearsIcametothistow n.3.ItistenyearsagoIcametothistow n.4.ItisthethirdtimeI（visit）tothistow n.5.Itwas2am.Tan gsha nearthquaketookplace.A.whe nB.that C.beforeD.si nee二.引導(dǎo)詞:1）形式主語(yǔ)2）形式賓語(yǔ)3）強(qiáng)調(diào)句|t作形式主語(yǔ)基本結(jié)

6、構(gòu)：It+be/v. + （forsb/ofsb1）todosth（動(dòng)詞不定式）doi ngsth.（動(dòng)名詞短語(yǔ)）/that/whether （從句）注意 1 : : FororOf?11.Itisimportantustolear nEn glishwell.2.ItisverykindyoutohelpmelearnEn glish.3.Itisfoolishyoutobelievehim.4.I tis necessaryyoutogooverthisless on.注意2;It何時(shí)代替doing?It+be+ no useno good + doing sthawasteoftime翻

7、譯：1. 和他爭(zhēng)論沒(méi)有用。2. 打電腦游戲是浪費(fèi)時(shí)間。 注意3 : that后的從句要用虛擬語(yǔ)氣(should+動(dòng)詞原形)，should可以省(1) .I tisapity(ashame/a nhono r/agoodth in g/afact/asurprise/.)that.（2）.Itisimporta nt（ necessary,strange , natural.）that.（3）.1 tis in sisted（ordered/comma nded,suggested/advised/proposed, dema nded/requested/required.）that.注意 4

8、 : Heissaid/reportedtohavegoneabroad.=Itissaid/reportedthathehasg on eabroad.Allthestude ntsarebelievedtohavedo netheirbest.=ltisbelievedthatallthestude ntshaved on etheirbest.注意5 : It+vi.（不及物動(dòng)詞）+thatIt happe ns thathewasout. 碰巧It seems thathedoesn tnowthesecret.好像It appears that heish on est.好像It o

9、ccurred to me thatIlostmypurse on thebus.我突然想至 UIt doesn t matter whetherhewillcomeornot.沒(méi)有關(guān)系It作形式賓語(yǔ)基本結(jié)構(gòu)：卄動(dòng)詞+it+形容詞/名詞+ （for/ofsb+ ） todo（動(dòng)詞不定式）thin kdo in gsth（動(dòng)名詞短語(yǔ)）/believethat 從句（從句）+findn ecessaryrfeelpossiblecon sider natural,suppose no use/no good/make awasteoftimekeep Ithi nkitimporta ntto m

10、ake a summary in time.Ifin ditagoodhabitthat we make a summary in time.Hefeltit no use learning En glish without speak ing it.it作形式賓語(yǔ)的特殊句型：V.+it+if/that/when動(dòng)詞有喜歡類：enjo y,like,appreciate,prefer討厭類：hate,dislikeIwould appreciateit ifyoupaidincash.Ilikeit_intheautumnwhen theweatherisclearandbright.Ihat

11、eit when peopletalkwiththeirmouthsfull.k引導(dǎo)強(qiáng)調(diào)句1. 基本結(jié)構(gòu)：ltis/was+ 被強(qiáng)調(diào)部分+that/who（ 人）. 例如：他是因?yàn)椴×瞬艣](méi)能幫我It wasbecausehewasillthathe couldn helpme.Was itbecausehewasillthathecouldn helpme?Why was it thathecouldn helpme?2. notuntil句式的強(qiáng)調(diào)句型：Itis/was no tu ntil+that.“直到才”例如：Hedidn tgethomeuntilitwasdark.三用在固定結(jié)構(gòu)中的ittakeitea