it用法课件-高考英语语法专题

It的用法归纳It的用法归纳：1、指代的作用2、形式主语/宾语3、强调句4、与it相关的句型1、指代的作用①人称代词，代替前文提到的人或事。Thisbikeisnotmine.It’sPeter’s.

—Isthebabyaboyoragirl?

—It’saboy.

注意：it,that,one都可代替前面提到的人或事it

用来代替前面提到的可数名词，所指的是事物本身；that

用来代替不可数名词，或代替特指的单数可数名词；one

代替前面出现过的单数可数名词，泛指Ican’tfindmypenanywhere.Imusthavelostit.

Lifetodayismuchbetterthanthatintheolddays.

Ican’tfindmypen.I’mgoingtobuyone.②用以代替提示代词this,that—Whatisthis?—It’sapen.—Whosepenisthat?—It’sJim’s.

③

指代性别不明或性别被认为不重要的人。—Whoisknockingatthedoor?—It’sme.

Whosebabyisit?

It’sverylovely.④指天气、时间、距离、自然环境等。*Itwasverycoldinwinter.*It’sseveno’clock.*WhatalongwayitisfromBeijingtoLondon!*Itwasquietatnight.⑤it指代整个句子所表达的意思。

Shefailedtheexamandit

madeherparentsworried.对比：Shefailedtheexam,which

madeherparentsworried.⑥

某些短语中,it无具体含义Doyoulikeithere?Icanmakeit.takeiteasy慢慢来；that’sit就这样，这就对了getit明白2、形式主语/宾语It

isnoteasytofinishitin2days.It

isnousearguingwithhim.It

isclearthathedidn’tknowit.Idon’tthinkit

easytostudyEnglish.Ithinkit

nousearguingwithhim.Hemadeit

clearthathedidn’tknowit.注意①seetoitthat…（务必,确保)takeitforgrantedthat…(想当然,认为理所当然)

Canyouseetoitthateverythingisready?Ijusttookitforgrantedthathewouldalwayshelpus.注意②Ihateit

whenpeopletalkwiththeirmouthfull.hate/dislike/like/love/enjoy/prefer/appreciate+形式宾语it+真正的宾语注意③主语从句中的虚拟语气Itisnecessary/important/strangethatsb.(should)dosth.

Itisapity/ashamethatsb.(should)dosth.

Itisrequired/suggested/desired/requested/proposed/ordered/thatsb.(should)dosth.3、it用于强调句Itwasanoldfriendwho/that/whomImetintheparkyesterday.ItwasintheparkthatImetanoldfriendyesterday.ItwasyesterdaythatImetanoldfriendinthepark.4、与it相关的句型①

Itwas+某一时刻+when…“当……的时候，时间是……”Itwas6:00whenIcamehome.4、与it相关的句型②

Itwas+一段时间+before…“过了多久才/就……”Itwillbe+一段时间+before…“要过多久才/就……”ItwasanhourbeforeIcameback.ItwillbeanhourbeforeIcomeback.4、与it相关的句型③

Itis/hasbeen+一段时间+since…“自从……有多久”注意：句中用is或hasbeen均可Itis3yearssincehewasasoldier.Itis3yearssincehejoinedthearmy.他退伍已三年了。他入伍已三年了。Itis3yearssinceIworkedthere.Itis3yearssinceIbegantoworkthere.我不在那工作已三年了。我在那工作已三年了。since从句中的谓语动词为短暂性动词时，意为：从这一动作开始以来有多久。

而当动词为延续性动词时，则表示：不做该动作（即动作的结束）以来有多久。④在表示“第几次做某事”时，注意时态的使用

It

is

thefirsttimethatIhavevisited

Beijing.It

was

thefirsttimethatIhadvisited

Beijing.⑤Itis(high)timethat…“该做某事的时候到了”

ItishightimethatIwent