since ten years ag就用什么时态
用一般过去时态改写句子:They are bank clerks.(were;students;ten years ag
since two years ago与since two years的区别,分别用在什么时态?
since the end of last years用什么时态
in the last ten years应该用什么时态?
for more than ten years用什么时态
英语语法问题since ten yearsten years agosince ten years ago这三者在时态上
since years ago用于什么时态
in last ten years 和in the past ten years有什么区别 分别用什么时态?
since ten years since ten years ago区别
since+一段时间用什么时态
since then用什么时态
He has _______(teach) English for ten years,teach该用什么时态