（疑问，否定，肯定，感叹）2、祈使语气（命令，要求，建议，警告）3、虚拟语气：不可能发生的事，愿望，建议，与事实相反的假设等学科网一、虚拟语气在条件中的具体用法真实条件句
fIfyouworkhardyou’llsurelypasstheexam虚拟条件句（假设情况不存在，实现机会很小）IfIwereabirdIcouldflyfreelyi
thesky
if从句的谓语动词1与现在事实相反动词过去式（be一律用were）
主句谓语动词wouldcouldmightshould动词原形
2与过去事实相反
haddo
e
wouldcouldmightshouldhavedo
e
3与将来事实可能相反
a动词过去式（be一律用were）
wouldcouldmightshould动词
bshould动词原形（不能用would）原形cwereto动词原形
1与现在事实相反if从句：动词过去式（bewere）主句：wouldcouldmightshould动词原形IfwehadtimewewouldgowithyouIfIwereyouIshould
’tdothatIfitwere
’trai
i
gwewould
’tstay2与过去事实相反if从句：haddo
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
fIfhecametomorrowIwouldtellhimeverythi
gIfitshouldrai
tomorrowIwouldstayathomea
dwatchTVIfitweretos
owtomorrowtheywould
otgooutShouldhecometomorrowpleasegivethebooktohim4错综时间条件句
有时时间会省略）学科网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
t6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had
fshould和were放在句首构成r