while可以放句首吗.什么时候用when,while造句要逗号

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/07/07 11:31:57

while可以放于句首,引导时间状语从句,其后的动词一般使用延续性动词,如：While I was reading,my father came in.
when也可以位于句首,同样引导时间状语从句,但其后的动词不一定是要用延续性的动词.如：when I can't do my homework,i will ask for my sister./ When he reached home,I was watching TV.

while可以放句首吗.什么时候用when,while造句要逗号用when while造句用when 和 while 造句`` 用while和when造句 when,while造句英语用while、when、since等造句用while,when,so...that造句. 英语用when和while造句用when、while造句并翻译在时间状语从句中什么时候应该用when while until befor 和after 可以详细说说while whe while引导的两个句子可以用逗号链接吗例如while Iwas playing the p while 造句要一般现在时