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关于when和while前后时态的题..

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关于when和while前后时态的题..
when和while的前后事态怎么用总是分不清楚 .以下是几道题..最好做完说说为什么用这个时态...比较笨
1 She (see)the police car while she (drive)to work
2 I (make) the dinner when the telephone (ring)
3 She (look) out of the window when she (see) the fire
4 The teacher (come) intu the room while we (play)a game
5 While I (take)my dog for a walk ,it (begin) to rain
一定要对啊 不然我更糊涂了...
关于when和while前后时态的题..
1.saw, was driving
2.was making,rang
3.looked,saw
4.came,were playing
5.was taking,began
when从句的时态一般是一般时态,while从句的时态一般是进行时态.主句是过去进行时,从句是一般过去时时用when.主句是一般过去时,从句是过去进行时时用while.