关于while/when和see sb doing的问题1.Tom was sleeping_____ Mary was dancing to the music.A.since B.when C.as D.while这一题为什么用while不用when2.When I was walking along the road,I saw a bird_____ over my head.A.flies B.flew C.to fly D.
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关于while/when和see sb doing的问题1.Tom was sleeping_____ Mary was dancing to the music.A.since B.when C.as D.while这一题为什么用while不用when2.When I was walking along the road,I saw a bird_____ over my head.A.flies B.flew C.to fly D.
关于while/when和see sb doing的问题
1.Tom was sleeping_____ Mary was dancing to the music.
A.since B.when C.as D.while
这一题为什么用while不用when
2.When I was walking along the road,I saw a bird_____ over my head.A.flies B.flew C.to fly D.flying
这题为什么用flying不用fly
关于while/when和see sb doing的问题1.Tom was sleeping_____ Mary was dancing to the music.A.since B.when C.as D.while这一题为什么用while不用when2.When I was walking along the road,I saw a bird_____ over my head.A.flies B.flew C.to fly D.
while 后面跟的从句就是现在进行时 when 则不一定是 而且while 还有“一者在做...另一者在做.”的意思,即两者比较的意思
第二句 saw a bird_____ over my head 中的flying 指的是正当我走在路上的时候发生的事 用 进行时
1.while 用法详见http://zhidao.baidu.com/question/89022897.html
2.see sb./sth. doing 表示看到某人/某物正在做某事