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1、 2 2 By the timeBy the time I came in , heI came in , he had startedhad started his his speech.speech. by the timeby the time 用来引导时间状语从句，意思是用来引导时间状语从句，意思是 “到到的时候的时候/到到之前之前”,相当于相当于 when when /before/before, 从句从句一般过去时一般过去时时时, 主句主句过去完成过去完成时态时态.2.2.主要是以过去口气过去口气强调在过去过去某个时间,或是 动作之前已经发生或完成的动作对过去过去所造成 的影响.也
2、就是过去的过去过去的过去. .3.时间标志by, beforeby, before和by the end of by the end of 加过去点时间by the time, whenby the time, when和beforebefore引导的时间状语从句NowNowleaveleaveget outsideget outsiderun away Before the police got to the shop, the man had run away.Nowthe policethe policeget to the shopget to the shopWhen his gra
3、ndma came here, The boy had grown up.his grandma Come heregrow upNowNow1. By the time I got to the cinema , the film_ 1. By the time I got to the cinema , the film_ (start) already.(start) already.2.He _ (finish) his homework before I came here.2.He _ (finish) his homework before I came here.3. By t
4、he end of last year, she _ (learn) to swim.3. By the end of last year, she _ (learn) to swim.4. I _(know) him when I was a student.4. I _(know) him when I was a student.5. She _(leave) before 9 oclock yesterday.5. She _(leave) before 9 oclock yesterday.6. The meeting _(begin) for half an hour by 6.
5、The meeting _(begin) for half an hour by 10:30 this morning.10:30 this morning.一Fill in the blanksFill in the blanks. .had startedhad finishedhad finishedhad learnthad learnthad knownhad knownhad lefthad lefthad been onhad been onPO单看单看OPOP之间为之间为过去过去用用一般过去时一般过去时站在站在O O点看点看OPOP之间为之间为现在的过去现在的过去用用现在完成时现在完成时站在站在P P点看点看P P点向左为点向左为过去的过去过去的过去用用过去完成时过去完成时现在现在Y YX X动作动作时间时间