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see sb do和see sb doing的例句 see sb in a while since,when,while的区别,我要关于语法的,例如,while sb bedoing 关于when 和 while 的有关练习题目when 和while when while and see sb doing sthi saw her flying kites when i walked to the building.请问：see sb do或doing sth是不是和后面从句的动词是否是延续性有关?短暂性的就用doing,延续性的就用do?可以这样理解吗? 关于英语短语问题（see sb do sth）see sb do 和see sb doing 有什么区别see sb do 不是see sb to do，只是省略了to是吧？ when和while区别 求关于when和while的语法区别 关于when和while前后时态的题..when和while的前后事态怎么用总是分不清楚 .以下是几道题..最好做完说说为什么用这个时态...比较笨 1 She (see)the police car while she (drive)to work2 I (make) the dinner when the see sb doing 和see sb do区别用法 see sb to do和see sb doing的区别? see sb.do和see sb.doing 怎样区分? see sb doing和see sb do有什么区别 see sb doing和see sb do 和see sb done区别 while,when,+什么（例：want sb to do sth） While和When的区别? when和while的区别