at the time、at that time与at this time的语用含义

at the time、at that time与at this time的语用含义 at that time at this time at the time at this moment at the at the time=at this time=at that time 对不对? at the moment与at that time 的区别? at the same time与at that moment的区别 at present in the past at this time at that time at themomen at that time 和 at the time的区别? at this time yesterday与this time yesterday的区别 at the moment &at this time The patient ( ) at that time. at the time when/that at that moment ；at this moment ；at this time ；at that time分别