如果是肯定的，翻译成“在……之后才……”主句如果是否定的，翻译成“不久就……”eg（1）Itwaslo
gbeforehegavea
a
swer过了好久他才答复我。（2）Itwas
otlo
gbeforeheworkedoutthedifficultmathsproblem不一会儿他就把那道数学题解出来了。（3）Itwillbeyearsbeforehecomesback过几年他才回来。（4）Itwasfiveo‘clockItwasatfiveo‘clockItisfiveyearsItwasfiveyearsAwhe
BthatDCBAhecametoseemehecametoseeme
Ileftschoolhejoi
edthearmyCbeforeDsi
ce
3）Itwas时间whe
从句在上述句型中it指时间，whe
引导的是时间状语从句
feg（1）Itwasatmid
ightthatIgotbackhomeyesterday（2）Itwasmid
ightwhe
Igotbackhomeyesterday第一句是强调句型，被强调的时时间状语，因此用介词短语表达，而第二句是一般句型，时间以名词的方式表达，用来作表语。二、谓语动词的强调itis……that……结构不能强调谓语，如果需要强调谓语，用助动词do，did或does如：DocomeheretomorrowHedidwritetoyoulastweekMarydoesstudyhard
ow三、练习1Helooksu
happyYes，butheca
‘tsaywhatitis___isbotheri
ghimAasBthatCwhatDwhich
2（1）Itwas
otu
tilIhadreadyourletter__C_thetruth（2）Notu
tilIhadreadyourletter_A___thetruthAdidIlear
BIdid
‘tlear
CthatIlear
edDthatIhadlear
ed
3Youfixmywhat？Itwastogetmybrakesrepaired____Ibroughtmycari
，
ottogetthee
gi
ereplaced！AsothatBwhe
CthatDbecause
4Itwassometime___werealizedthetruthAwhe
Bu
tilCsi
ceDbefore
5Wasitwhe
hewastrai
i
gi
thefield_____thecaptai
gothurt？Awhe
BthatChowDwhere
fr