Unit 5 It must belong to Carla

Period 1

Jim

Guessing Who has the following things?

表示推测的情态动词 　 在英语中，表示对某件事物的确定程度，即表示推测的时候，我们通常会用到以下情态动词：must, might, could, may, can’t, couldn’t.

must can’t could might 100% probably true 20%-80% possibly true almost not true

Learn to make inference 程度 肯定句 否定句 疑问句 must ★ ★ ★ ★ √ may ★ ★ ★ might /could ★ ★ can’t can ★

must用在肯定句中表示较有把握的推测，意为“一定”。(100%) He must be working at home. must 表示对已发生的事情的推测时，must 要接完成式 . The road is wet. It must have rained last night

He can’t be _______. He could/might be _______.

He can’t be _______. He could/might be _______.

He can’t be _______. He could/might be _______.

He can’t be _______. He could/might be _______.

He must be __________.

Can you guess what it is? It could be _________________. It also might be ______________. a white vase two faces

Can you guess what it is? It could be ___________. It also might be a dog two girls

Which one is bigger, A or B? No. Could A be bigger than B? In fact, A and B must be ___ ________________. the same size B A

must could 1. 这本书一定是李雷的。他正在找这本书。 This book _____be Li Lei’s. He is looking for it. must 2. 这个发带可能是韩梅的。她喜欢戴发带。 The hair band ______be Han Mei’s. She likes wearing a hair band. could

might can’t 3. 这个玩具熊可能是约翰的妹妹的。 她还是个小姑娘。 The toy bear ________belong to John’s sister. She is a little girl. might 4. 这个排球不是玛丽的。她根本不喜欢排球。 The volleyball ______be Mary’s. She doesn’t like playing volleyball at all. can’t

hat volleyball plate T-shirt Toy car cup jacket magazine CD book Clothing Fun things Kitchen things hat volleyball plate T-shirt Toy car cup jacket magazine CD book

He was the only little kid at the picnic. Listening and speaking (1b: P34) 1. Jane’s little brother toy car He was the only little kid at the picnic. 2. Mary book Hemingway is her favorite author.

3. Carla volleyball She loves volleyball. 4. Deng Wen magazine He loves cats. 5. Grace CD She always listens to classical music.

一. can和could的区别和用法 1. can表示体力和脑力方面的能力, 或根据客观条件能做某种动作的“能力”。 例如： 　 Can you speak English？　　 　 Can you make a cake？ 　 can用在否定句和疑问句中时有时表示说话人的 “猜测”或 “不肯定”。

例如： 　 Can the news be true？ 　 (在日常会话中, can可代替may表示“允许”, may比较正式) 2. could 是 can的过去式, 表示过去有过的能力和可能性, 还有怀疑和不肯定的意思(在否定和疑问句中)。

e. g. 　　She couldn’t skate when she was five years old.　 （能力） 　　At that time we thought the story could be true． （可能性） could用来提问, 是有礼貌的请求 Could...，please? 语气较为婉转。

e. g. Could I speak to Mr. Smith, please? 二. Might和may的区别和用法: 1. may的用法: 　 a. 表示“允许”或“请求”。 e. g. May I come in？

　 在使用这一用法时需注意: may表示“允许”的否定形式是must not, 意思是“不应该” “不许可”。e. g. 　　—May I take this book out of the reading-room？ 　　—No, you mustn’t． b. 表示说话人的猜测，认为某一事情“或许”或“可能”发生。

e. g. 　 He may know the answer． c. may用在感叹句中可表示祝愿、愿望。 May you succeed．(祝你成功。) May you have a pleasant journey． (一路平安。)

2. might的用法: a. might可以代替may, 表示现在时间的动作，但语气较为婉转客气或更加不肯定。 e. g. 　 Might I take a suggestion？ 　 b. might用来表示现在时间时, 还可表示“规劝”。

e. g. 　　You might pay more attention to spoken English． 三. must与have to的区别 　 have to比较强调客观需要, must着重说明主观看法。另外have to能用于更多时态, 比较下面的句子：

We had to be there at 10:00. 有时两者都可以用, 意思差别不大。 e. g. We must/have to leave now. must在表示说话人对事物的推测时候要注意它比may肯定得多, 相当于汉语的“一定”或“准是”。(只有在肯定句中能这样用。)

　 This must be your room． 　 在回答由must引起的问题时, 如果是否定的答复，不能用mustn’t, 而需要用needn’t或don’t have to, 因为mustn’t是“一定不要”的意思。

1. Choose the best answer 1. I didn’t hear the phone. I ___ asleep. A. must be B. must have been C. should be D. should have been 2. Mary ____ be in Paris. I saw her in town only a few minutes ago. A. mustn’t B. shouldn’t C. can’t D. may not B. must have been C. can’t

3. Peter ____ come with us tonight, but he isn’t very sure yet. A. must B. may C. can D. will 4. I thought you ____ like something to read, so I have brought you some books. A. may B. might C. could D. must B. may B. might

2.Translation 1. 这本书一定是李雷的。他正在找这本书。 This book must be Li Lei’s. He is looking for it. 2. 这个发带可能是韩梅的。她喜欢戴发带。 The hair band could be Han Mei’s. She likes wearing a hair band.

3. 这个玩具熊可能是约翰的妹妹的。 她还是个小姑娘。 The toy bear might belong to John’s sister. She is a little girl. 4. 这个排球不是玛丽的。她根本不喜欢排球。 The volleyball can’t be Mary’s. She doesn’t like playing volleyball at all.