题目

句子的语法正确吗
1.The work has been completed,but it has not been reviewed by teacher.
2.The work was completed,but it has not been reviewed by teacher.
3.The work was completed,but it was not reviewed by teacher.
三个句子都是正确吗?用法有甚麼分别呢

提问时间：2021-03-31

答案

1.说的是工作到现在已经完成了,有一个时间点,从那个时间点到现在已经完成,可是到现在老师还没检阅.
2.说的是工作在过去某个时间就完成了,后面半句同1
3.前半句同2,后面说的是老师在以前还没阅过,现在阅没阅不知道
That is all.
望采纳