人教版九年级英语第八单元第四课时 Section A Grammar 4a-4c 共27张幻灯片

Section A (Grammar Focus-4c) Period Four

To learn how to use must, might, could and can’t for making inferences It must be Carla’s.

It could be Mei’s hair band.I’m not sure, but it can’t be a dog.

Words Review

laboratory outdoors coat sleepy

n. 实验室 lab adv. 在户外；在野外 n. 外套；上衣 adj. 困倦的；瞌睡的

Whose volleyball is this? It must be Carla’s. She loves volleyball. Whose hair band is this? It could be Mei’s hair band. Or it might belong to Linda. They both have long hair. What did you see that night? I’m not sure, but it can’t be a dog. It was bigger. I think it might be a bear or a wolf.

这是谁的排球？ Whose volleyball ________ ________is this? 一定是卡洛的，她喜欢打排球。 It _____ She loves volleyball. must____Carla’s. be 这是谁的发带？ Whose _____ this? hair ______is band 可能是May的。或者可能是属于Linda的。 他们都留长发。 could____Mei’s be might It _____ hair band. Or it ____ ______ ____Linda. They both have long belong to hair.

那天晚上你看见了什么？ that night What did you see______ _______? 我不太确定，但肯定不是一只狗。它比较大。 我想可能是一只熊或者狼。 not ______, sure but it ______ can’t_____a be I’m____ might be dog. It was bigger. I think it _________ a bear or a wolf.

【观察领悟】

情态动词表示推测

仔细观察例句, 体会情态动词的具体含义。

1. The e-dictionary must be Nancy’s.She is the only one who has an edictionary in our class.

2. The man must be waiting for the busat the bus station.

【观察领悟】

情态动词表示推测

3. The watch could belong to Mike. I

know he has one like this.4. The novel might be Linda’s. She likes reading novels.

5. The black backpack can’t belong toRuth. Hers is red.

知识构建情态动词的基本概念。

情态动词表示说话者的语气和情态, 无人称和数的变化 ; 本身虽有一定的 意义, 但不能独立作谓语, 后接动词原 形, 一起构成谓语。常用来表示说话人 对有关行为或事物的态度和看法, 认为 其可能、应该或必要等 ; 或用来表示 推测或判断。

知识构建表示推测的情态动词 情态动词must, may, can, could, might 等用来表示推测和判断。具体用法如下： 1.must:意为“一定；准是”。表示 说话人对事物的推测的把握性非常大。 They are wearing school uniforms, they must be students.

知识构建表示推测的情态动词

―must be+现在分词”意为“一定正 在……‖,表示对说话的时刻推断另 一个动作正在发生或进行。 eg: She must be cooking now because I can smell something delicious.

知识构建表示推测的情态动词

―must have +过去分词”意为“一 定……‖,表示对过去情况的肯定的 推测。 eg :I can’t find my keys .I must have left them at home.

知识构建表示推测的情态

动词 2. can: can表示推测时，常用于否定句、疑 问句中，can’t意为“不可能；应该不是” 。 常用句型为：“can/can’t be +表语”意为“ (不)可能……‖,表示对现在情况的否定 推测。 eg: That can’t be Maria, because she’s in hospital. There’s someone outside. Who can it be?

知识构建表示推测的情态动词 3. could/might/may:如果表示对所推测 事情没有很大的把握，用could或might或 may。它们常用于肯定句或疑问句中，意 为“也许；可能”。 eg: He might be doing his homework now. Could the news be true?

强化训练

单项选择。

1.—Excuse me, whose book is this? —It__be John’s. It has his name on it. A A. must B. need C. can’t

强化训练2.The man ____ be my English teacher. He has gone to Canada. A. might B. must C C. can’t 3. Martin__get here in time, but I am not sure. B A. must B. might C. can D. should