when doing 和 while doing 的区别when doing 和 while doing 有什么区别?最好有相关造句说明.还得有中文解释啊

when和while后面可以直接加动名词的短语吗,比如when/while doing sth when和 while前后加DO或DOING的形式 when doing 和 while doing 的区别when doing 和 while doing 有什么区别?最好有相关造句说明.还得有中文解释啊 what were you doing when he arrived为什么是 when 不是while when 和while 后面跟什么时态 what were you doing __your father__back?A.while ;came B.when ;came C.while ;was coming D.when ;was coming 各举一个be+doing+while+be+doing和be+doing+when+did的例句,be最好为过去时 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. when和while区别 what was he doing ______ you saw him last night如题.a.while b.when c.before d.after 是用when么?怎么不是while What were you doing ______there was a knock at the door?A.while B.until C.when D.after I'm doing my homework ____my mother is reading newspapersA .till B when C while D after () i am writing this ,you can be doing something elseA.while B.when C.as D.for I was doing my homework_____ the light went out.A .when B.as C.while D.since While和When的区别? when和while的区别 when和while的区别 while和when的用法 when 和 while的用法