【正文】
have to 強(qiáng)調(diào)客觀上要求“不得不” must 強(qiáng)調(diào)個(gè)人主觀感覺(jué)“必須 。沒(méi)有人稱、時(shí)態(tài)和數(shù)的變化。 He visit his grandfather today. ② 今天你不必穿校服 。 You a ticket to go into the cinema. 答案 : ① has to ② don’t have to ③ must buy Ⅰ . 單項(xiàng)選擇 1. —Can we wear hats in class? — . A. Yes, we do B. No, we don’t C. Yes, we can D. Yes, we can’t 2. —Can I use your ruler? —Yes, you . A. may B. need C. can D. must 3. — do you have to do after school? —Do my homework, of c