it引导时间状语从句与it引导主语从句有什么区别比如It was October 1st,1949 when the People's * was founded.此句为什么是it引导的时间状语从句而不是it做形式主语引导主语从句,when在从句中做状语,请说一下区别,
问题描述:
it引导时间状语从句与it引导主语从句有什么区别
比如It was October 1st,1949 when the People's * was founded.此句为什么是it引导的时间状语从句而不是it做形式主语引导主语从句,when在从句中做状语,请说一下区别,
答