精讲课 笔记随视频锁定
When did you…?

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。

  • When did you air the room? → I aired the room in the morning.
  • When did you clean your shoes? → I cleaned my shoes in the afternoon.
  • When did you open the box? → I opened the box just now.
  • It is raining. → It rained yesterday.
  • It is snowing. → It snowed yesterday.
  • He is boiling some eggs. → He boiled some eggs yesterday.
  • ? → We enjoyed it yesterday, too.