问题描述:
区别一般过去式和过去完成式
Why not go to see the doiphin show with me?
Because I______it.
应该选saw,还是have seen ?
为什么?
Why not go to see the doiphin show with me?
Because I______it.
应该选saw,还是have seen ?
为什么?
问题解答:
我来补答展开全文阅读