They were walking home _____ a tall man stopped them and demanded their purses.A.when B.while C.that D.until 为什么?还有,为什么不能选D?我觉得选until可以突出“他们走路回家”这个动作一直持续到那男的拦住他们…

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Theywerewalkinghome_____atallmanstoppedthemanddemandedtheirpurses.A.whenB.whileC.thatD.until为什么?还有,为

They were walking home _____ a tall man stopped them and demanded their purses.A.when B.while C.that D.until 为什么?还有,为什么不能选D?我觉得选until可以突出“他们走路回家”这个动作一直持续到那男的拦住他们…
They were walking home _____ a tall man stopped them and demanded their purses.A.when B.while C.that D.until 为什么?还有,为什么不能选D?
我觉得选until可以突出“他们走路回家”这个动作一直持续到那男的拦住他们…为什么不可以这样理解呢?

They were walking home _____ a tall man stopped them and demanded their purses.A.when B.while C.that D.until 为什么?还有,为什么不能选D?我觉得选until可以突出“他们走路回家”这个动作一直持续到那男的拦住他们…
这是when的一个句型,when表示“突然”,when前面的句子共有三种情况
1.进行时 (本题)
2.be about to 即将,正要做某事 I was about to go out when the telephone rang.
3.状态 (比如be at work)

when 表示当。。。时候的意思,后面从句一般加一般过去时态,主句用进行时态
while表示当。、。时候的意思时,后面从句加进行时态,主句加一般过去时态
until 是知道。。。时候的意思,不符合语境

when是“当……时”的意思,until虽也引导表示时间的,但其内含有“直到……才”的意思,故不能选。

when while 都解释为当。。。时,只是while后面必须动词为ING形式
until的话解释为直到。。。时,语义不通啊。。。

when用于特殊状况 意料之外的
until则是一个持续性动作的停止 前面应该是一个状态 并且情况发生后状态结束

until是加瞬间动词,不可持续,而题中说的是were walking是持续。你的意思我明白,但是如果你选D那你就更要明白until的瞬间与非瞬间用法。(我只是回答你所存在的问题,并没有回答这道题为什么选A,我相信你会)

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