I am going to Qindao and stay there for a week ._you are there ,would you bu

问题描述:

I am going to Qindao and stay there for a week ._you are there ,would you bu
buy some books for me >为什么while 而不是if引导的时间状语

if不能引导时间状语,if只能引导条件状语从句.while是用来引导时间状语的.