Module 12 Unit 3 Language in use 课件 2023-2024学年外研版英语八年级上册

Module 12 Help Unit 3 Language in use 外研版英语八年级上册 1. That could be harmful! 2. Betty, you must know! 3. Stay away from windows and heavy furniture. 4. Do not stand near street lights or under power lines. 教材链接 语法探究 祈使句和情态动词must，can，could 表示推测 一、祈使句 祈使句表达说话人对对方的叮嘱、劝告、希望、禁止、建议、请求或命令等。祈使句一般以动词原形开头，无时态和数的变化。常见的句型如下： 语法详解 类型 句型结构 例句 Do型 肯定：动词原形(＋宾语)＋其他成分． Stand up！ 否定：Don't/Never＋动词原形(＋宾语)＋其他成分． Don't swim in the river. 类型 句型结构 例句 Be型 肯定：Be＋表语(名词或形容词)＋其他成分． Be careful！ 否定：Don't/Never＋be＋表语(名词或形容词)＋其他成分． Don't be late！ Let型 肯定：Let＋宾语＋动词原形＋其他成分． Let's go！ 否定：Don't let ＋ 宾 语 ＋动词原形＋其他 成分．； Let＋宾语＋not＋动词原形＋其他成分． ◇Don't let me cry! ◇Let's not play on the street. 注意： 1. 用客气的语气表示祈使句时，可在句首或句末加上please，但如果在句末加please，那在please之前一定要加一个逗号“，”。如：Take a seat, please. 2. 祈使句中如果有呼唤语，一定要用逗号“，”隔开，可放在句首或句末。如：Li Ming, come here. 3. 表示禁止时，尤其是标语等也可用“No＋动名词”或“No＋名词”来表示。如：◇No smoking. 禁止吸烟。◇No parking. 禁止停车。◇No photos! 禁止拍照！ 二、情态动词must，can，could表示推测 1. 情态动词can和could用于表示对现在或将来的推测，意为“会，可能”，往往用于否定句和疑问句中，用于疑问句时，can比could表示的“可能性”要大；用于否定句时，cannot (can't)表示“不可能”。could则可用于肯定句、否定句和疑问句。在以下例句中，can和could均表示可能。如：◇It could be afraid. ◇Can/Could this be true? 2. 表示有把握的推测时：肯定句用must，意为“一定，准是，肯定”，通常只用于肯定句。否定句用can't，意为“不可能”。如：◇You must be tired after a day's work. ◇You can't be sleepy because you just wake up. 一、单项填空。 ( )1. (2022•贵港中考)—Laura is a ________ girl. —I think so. She is only 3, but she isn't afraid of singing in public. A. clever B. serious C. brave D. careful C 课堂检测 ( )2.—Whose book is this? —It________ be Jim's.There is a name called Jim on it. A. probably B. maybe C. may D. must ( )3. Look at the clouds! It________ rain soon.Please take an umbrella with you. A. can B. may C. had better D. has to D B ( )4. My English teacher________be in the classroom.I saw her in the teachers' office just now. A. mustn't B. needn't C. can't D. must ( )5.________ stand under the big tree when a he