You’regreat!WatchanddubUnit1MyclassroomLesson2精通版·三年级下册EnjoythevideoWhat’sthevideoabout?Goodafternoon,class.TodayisCleaningDay.Ourclassroomisdirty.Let’scleanittogether.Lead-in教室；课堂脏的打扫Howdowecleantheclassroom?我们怎样打扫教室呢？提出行动建议：Letme+动词原形(+其他).注意：letme