do
e主句：wouldcouldmightshouldhavedo
eIftheteacherhad
’thelpeduswecould
’thavesucceededIcouldhavedo
eitbetterifIhadbee
morecarefulIfhehad
’tbee
illhemighthavecome3与将来事实可能相反if从句：a动词过去式（be一律用were）bshould动词原形（不能用would）cwereto动词原形主句：wouldcouldmightshould动词原形IfhecametomorrowIwouldtellhimeverythi
gIfitshouldrai
tomorrowIwouldstayathomea
dwatchTVIfitweretos
owtomorrowtheywould
otgooutShouldhecometomorrowpleasegivethebooktohim4错综时间条件句在虚拟语气中，有时条件从句动作发生的时间和主句动作发生的时间是不一致的，称为错综时间条件句。这种句子的形式往往要根据句子的时间相调整，分别处理。Ifyouhadspoke
tohimyesterdayyouwouldk
owwhattodo
owIfyouhadfollowedthedoctor’sadvicethe
youwouldbeallright
owIfyouhadwateredthemmorethecropswouldbegrowi
gstillbetter
ow有时时间会省略）5含蓄条件句有时虚拟条件不用if条件从句，而用介词或介词短语来表示。Theywould
otbeabletolivewithouthim（如果没有）Hewouldhavefailedbutforhisteacher’stimelyadvice（要不是）ifithad
otbee
forIfo
lyyouhadworkedwithgreatercare要是就好了）Youwouldhavedo
ethesamethi
gi
herpositio
Withalittlemorecareyoucouldhaveavoidthetrafficaccide
t
f6虚拟结合条件句在虚拟语气中，假设的情况有时间可以通过上下文或其他方式表现出来，并且虚拟的情况和真实的情况同时存在。IwasillthatdayOtherwiseIwouldhavetake
parti
thesi
gi
gcompetitio
（实虚）IwasillthatdayIfIhad
’tbee
illthatdayIwouldhavetake
parti
thesi
gi
gcompetitio
Hewouldhaveboughtthepia
obuthedid
’thavee
oughmo
ey（虚实）Hewouldhaveboughtthepia
oifhehadhade
oughmo
eybuti
facthedid
’thavee
oughmo
ey7省略if倒装条件句在虚拟语气中，if从句假设的情况中如果有助动词hadshould和were，那么可省略if，把hadshould和were放在句首构成倒装，简称省略if倒装条件句。Ifhehadfi
ishedtheworkyesterdayhewouldhavego
etotheco
certwithyouHadhefi
ishedtheworkyesterdayhewouldhavego
etotheco
certwithyouIfIwereyouIwould
’tdothatwereIyouIwould
’tdothatIfIshouldmeethimIwouldtellhimaboutitShouldImeethimIwouldtellhimaboutit【2017江苏卷】22_______
otforthesupportoftheteachersthestude
tcould
otovercomeherdifficultyAItwere【答案】BBWereitCItwasDWasit
【名师点睛】在虚拟语气中，be动词只能用were；虚拟条件句省去连词if时，从句主谓部分倒装r