it is 时间段since从句和it has been时间since从句的区别
it is 时间段since从句和it has been时间since从句的区别
it is 时间段since从句和it has been时间since从句的区别两者可以互相转换吗,英语专业人士来.
造句it has been +时间段+since从句
it is + 时间段 + since…和It has been+ 时间段 + since的问题
It is / has been + 段时间 + since + 一般过去时,从句中的动词用延续性动词和非延续性动词有何
it is 时间段和it has been时间 区别
It is\has been+时间段+since+一般过去式=时间段+()+since+一般过去式
一个英语问题句型“It’s / It has been + 一段时间 + since + 时间状语从句”中什么时候用is
It is +一段时间+since+从句 和 before
It was +时间段+since 从句 从句应该用什么时态
it is/has been+时间段+since since后面接完成时还是一般过去?
It is+时间段+since+时间点