精讲课 笔记随视频锁定
must 推测现在与过去

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。

推测现在 推测过去
  • You must be the new teacher. 一般现在时
  • They must be waiting for you. 正在进行时
  • It must have rained last night. 昨天晚上肯定下雨了
  • She must have cried just now. 她肯定刚刚哭过