I was walking along the street _______ I met a friend of mine.A.while B.when C.as D.since 要原因

I was walking along the street _______ I met a friend of mine.A.while B.when C.as D.since 要原因
I was walking along the street _______ I met a friend of mine.A.while B.when C.as D.since 要原因

I was walking along the street _______ I met a friend of mine.A.while B.when C.as D.since 要原因
B 对
当一个动作发生另一个动作正在进行.
注：A 后的动词一般用进行时； C 与D 没有这种用法
加油!不明白再问!如果帮到你,请采纳,谢谢!

选B, 这句话的意思是当我看到我朋友时我正独自走在大街上，while引导的是非延续性词，而when引导的是延续性词，CD意思与句子意思不符

选B 此题是考查while ,when 和as 的用法，表“当....的时候”
when 常用于此句型：...be doing ...when ...did...(当某人正在做。。，这时突然。。)或 ...be about to ...when ... did..（当某人即将要做。。这时突然。。）
while 强调两者都在做。。（并隐含一种对比）如：I was readi...

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选B 此题是考查while ,when 和as 的用法，表“当....的时候”
when 常用于此句型：...be doing ...when ...did...(当某人正在做。。，这时突然。。)或 ...be about to ...when ... did..（当某人即将要做。。这时突然。。）
while 强调两者都在做。。（并隐含一种对比）如：I was reading newspaper while my father was watching TV.
as 强调两个动作同时进行，意为：一边。。。一边。。。
如：He went out of the classroom as I came in .

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