英語IF虛擬語氣課件

SubjunctiveMoodInIf-clauses虛擬語氣在條件句中的運(yùn)用Enjoymusicandpayattentiontotheif-clausesinthelyrics.IfIwereaboyIthinkIcouldunderstandhowitfeelstoloveagirl.IswearI’dbeabetterman.I’dlistentoherbecauseIknowhowithurts.真實(shí)條件句所表示的假設(shè)是可能發(fā)生或?qū)崿F(xiàn)的,是與事實(shí)相符的。非真實(shí)條件句所表示的假設(shè)則是不可能或不大可能發(fā)生或?qū)崿F(xiàn)的，或與事實(shí)相反的情況。

試比較:Ifitrainstomorrow,Iwillstayathome.IfIwereabird,Iwouldflyinthesky.Ifitshouldraintomorrow,Iwouldstayathome.真實(shí)條件句&非真實(shí)條件句Ifyou________ice,it______intowater.(heat/turn)2.Aballoon________ifyou_______apinintoit.(burst/stick)3.Ifyou________steam,it________intowater.(cool/turn)4.Metal_______ifyou______it.(melt/heat)5.Wood_______ifyou______itintowater.(float/put)6.Aglass_______ifyou_____it.(break/drop)

heat

melts

put

floats

drop

breaks

turns

bursts

turns

heat

cool

stick

2.You

may______(pass)

the

exam

if

you

___(study)

hard.

rainswillstaypassstudy

3.Ifyouwanttorecord,________(press)theredlight.press1.IfIt______(rain)tomorrow,I______(stay)athome.Fillintheblanketswiththeproperform

1.I’msureifhe_____(go)totheparty,he________(have)agreattime.2.Iftherain_______(stop)tonight,wewillgotothecinema.3.I’llbuyacomputerifI______(have)enoughmoney.4.You_________(notget)nervousifyou_____(do)enoughexercise.6.Iwanttoknowifhe_________(come)tomorrow,ifhe_______(come),I__________(give)themassagetohim.goes

willhave

stopshave

won’tgetdo

comes

willcome

willgiveIfIhadamilliondollarsnow,Iwouldtravelaroundtheworld.Ifapologywereuseful,wewouldnotneedthepolice.注：在虛擬語氣be動詞所有人稱都用were.

道明寺

小結(jié)一：表示與現(xiàn)在事實(shí)相反

時(shí)間條件從句結(jié)果主句表示與現(xiàn)在事實(shí)相反If+主語+動詞過去式（be動詞用were）主語+should/would/could/might+動詞原形Iftheapplehadfallenonmyheadatthatmoment,Iwouldhavefoundthelawofuniversalgravitation.

小結(jié)二：表示與過去事實(shí)相反

時(shí)間條件從句結(jié)果主句表示與過去事實(shí)相反If+主語+had+過去分詞主語+should/would/could/might+have+過去分詞IfIdidnotattendthecollegeentranceexam,IwoulddoeverythingwhatIwant.Iwould,Ifitweretobethelastdayoftheworldtomorrow,gotosleepbecause‘tomorrowisanotherday’.

小結(jié)二：表示與將來事實(shí)相反

時(shí)間條件從句結(jié)果主句表示與將來事實(shí)可能相反If+主語+動詞過去式/wereto＋動詞原形/should+動詞原形主語+should/would/could/might+動詞原形總結(jié)時(shí)間條件從句結(jié)果主句表示與過去事實(shí)相反If+主語+had+done主語+should/would/could/might+have+done表示與現(xiàn)在事實(shí)相反If+主語+did（be用were）主語+should/would/could/might+do表示與將來事實(shí)可能相反If+主語+did(be用were)/weretodo/shoulddo主語+should/would/could/might+doa.Ifthey____(be)here,they__________(take)youradvice.b.Iftheworld-war_____(break)outagain,what_____________(happen)toourpeopleonearth?werewouldtakebrokewouldhappenPRACTICE1:Fillintheblanks.1.我如果有時(shí)間肯定會去的。2.我要是懂德語，我就會給你讀這篇文章。3.如果他在這里，我們會問他的。4.如果明天放假，那該多好。

IwouldcertainlygoifIhadtime．IfIknewGerman，Iwouldreadthepapertoyou.Ifhewerehere，wecouldaskhim．Itwouldbeniceifitwereaholidaytomorrow.Translatethesentences.a.IfTom________(be)morecarefulintheexam,he________________(pass)italready.b.Ifyou_______(get)upearlier,you________________(catch)thefirsttrain.hadbeenwouldhavepassedhadgotwouldhavecaughtPRACTICE2:Fillintheblanks.假如他來了,我們對他說什么呢？Ifhe

wereto

come,what

should

wesaytohim.假如他看見我,就會認(rèn)識我。Ifhe

should

seeme,he

would

knowme.a.Ifthere________(be)nonaturalresourceanymore,we___________(make)useofnuclearpower.b.What____________(happen)ifyou____________(getup)toolatetomorrow?c.IfRobots_____________(control)theworldsomeday,there________(be)nofriendship.shouldbewouldmakewouldhappengotupPRACTICE3:Fillintheblanksweretocontrolwouldbe補(bǔ)充一：虛擬語氣的倒裝虛擬條件句中有were,had,should時(shí),可把if省略,而把were,had,should放在主語前,用倒裝結(jié)構(gòu)。如:

WereIabird,Iwouldflyinthesky.Hadyouinformedmeearlier,Iwouldnothavebeenlateforschool.

ShouldIhavetimetomorrow,Iwouldcallonher.

主句與從句的動作發(fā)生在不同的時(shí)間,這時(shí)主從句位于動詞的虛擬語氣形式因時(shí)間不同而不同,這叫做混合條件句或者叫做錯綜時(shí)間虛擬句。

Ifyou

hadasked

himyesterday,you

would

know

whattodonow.IfIwereyou,Iwouldhavetakenhisadvice.補(bǔ)充二：錯綜時(shí)間虛擬句補(bǔ)充三：含蓄條件句