4.if条件状语从句中,主句用将来时,从句用一般现在时表将来。
I won't go there, if it rains tomorrow.
【例3】 The three of us ________ around Europe for about a month last summer.
A.travelled
B.have travelled
C.had travelled
D.travel
【例4】 When I got on the bus,I ________ I had left my wallet at home.
A.was realizing
B.realized
C.have realized
D.would realize
【特别提醒】
1.一般过去时也可与since和for引导的时间状语连用。例如:
I ________ in London for many years,but I've never regretted my final decision to move back to China. A.lived
B.was living
C.have lived
D.had lived
2.一般过去时还可与today,this week,this month,this year等时间状语连用,但这些时间状语显然是指不包括“现在”在内的过去时间。例如: Did you see her today?你今天见到她了吗?
3.如果since从句的谓语动词是静态动词,则表示动作或状态已结束,不再持续下去。例如:
It's two weeks since he was ill.他病愈已有两周了。
It's a long time since she lived here.
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