精讲课 笔记随视频锁定
What's the exact time？确切的时间是几点？

右侧笔记支持独立滚动。边听名师连读拆解，边对照右侧的语法事实与统计数据笔记。

现在完成时 一般过去时 一般将来时

Have you ever been to…?

  • Yes, I have.
  • No, I haven’t.

When did you go there?

When will you go there?

Must Had better
I must stay here. You’d better stay here.
You must wait for him. You’d better wait for him.