that,this开头的时间状语,何时需要用介词,何时不用?(如at that time,that morning)
that,this开头的时间状语,何时需要用介词,何时不用?(如at that time,that morning)
at that time 为什么要加介词at ,不是说,that后加时间状语,之前不用加介词吗?
状语从句何时用what或that,该如何区分
by this time、by that time、at this(that?) time、since then 的区别
问何时填that 何时填as
英语 何时定语从句必须用that
at the time、at that time与at this time的语用含义
at that moment ;at this moment ;at this time ;at that time分别
each other前何时要用介词何时不用
定语从句何时只用THAT,何时只用WHICH?
at this time用什么时间状语
在定语从句中,that何时后面要加完整的句子,何时又不要?