they were walking on the street when all of a sudden they sa

they were walking on the street when all of a sudden they saw a 100 yuan bill.
为什么不能用while

xdtyft 1年前已收到1个回答举报

ee梵客幼苗

共回答了12个问题采纳率：91.7% 举报

while引导时间状语从句时,从句中的动词必须是延续性的,并常用进行时态.本句中的saw a 100 yuan bill 是短暂性动词,所以不能用while引导.

1年前

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你能帮帮他们吗

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