【正文】
Revision ? What tenses have we learnt? 時(shí)態(tài) review The simple present The simple past The simple future The present progressive tense 現(xiàn)在進(jìn)行時(shí) 過去式 現(xiàn)在分詞( ing) ? buy bought buying ? make made making ? see saw seeing ? study studied studying ? shop shopped shopping ? take took taking Period 1 Unit 3 What were you doing when the UFO arrived? What’s he/she doing? What are they doing ? Let’s guess What’s he doing? He’s smoking . Wh