while 1.通常用在事情同时发生的情况,主句和从句都用过去进行时 eg:Mother was cooking the meal while i was doing my homework. 当妈妈在做饭的时候,我正在做功课 2.表示同时,而...的意味时,主句和从句的时态是一致的,即可以都是一般现在时,又可以都是一般过去时,如: I like playing football while Jim likes playing basketball. 我喜欢踢足球,然而Jim喜欢打篮球. Yesterday my parents went to the cinema while I stayed at home. 昨天爸爸,妈妈去看电影了,而我呆在家里在.本回答被提问者和网友采纳
第2个回答 2018-04-22
when:主句用过去进行时,而从句一般用于过去时。while:从句和主句都用过去进行时,表明两个动作都在同时发生如:Jim was reading while Kate was watching TV.当凯特正在看电视的同时,吉姆正在读书。或者Jim came in while Kate was watching TV.当凯特正在看电视的时候,吉姆进来了。