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2024-12-05 16:30本頁(yè)面
【正文】 s, you must . No, you needn’t./ don’t have to. 2. 肯定 … must be/ mustn’t be 表肯定的猜測(cè) He may be a thief. (可能） He must be a thief.（一定） He must be a teacher ,isn’t he ? This story must be true , for I read it in Shenzhen Daily . What’s he ? He must be a scientist , for he knows much about science. must / may be +名詞 /形容詞 /介詞短語(yǔ) Where is Ken ? He must be in the library . I saw him there just now . 表示猜測(cè) may be (可能是） must be (一定是 ) mustn’t be (不一定是） can’t be (一定不是） 4. 表示需要 need (1) need 作 行為動(dòng)詞 這時(shí) need 就象其他動(dòng)詞一樣 ,有第三人稱單數(shù) needs, 也有過去式 needed 1. need to do sth He needs to buy a pair of shoes. Does he need to buy a pair of shoes? He doesn’t need to buy a pair of shoes. What does he need to buy? exercise: They needed our help. ? 2. need sth to do sth ? I need a bike to go to school. ? 3. need sth ? She needs a lot of money. ? She doesn’t need a lot of money ? 4 sth. need doing ? = sth need to be done ? My hair needs washing. My hair needs to be washed. ?You needn’t return the book now. ? Need he go yesterday? ?Yes, he must./ No, he needn’t. ? （ 2） Need作 情態(tài)動(dòng)詞 時(shí)， 過去式也是need, 多用于否定或疑問結(jié)構(gòu)，一般不用于肯定句，表示“必要”。 沒有必要 needn’t =don’t need to =don’t have to May…? Must…? Need…? No, sb. can’t/may not/mustn’t.
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