Unit 6 课时3 语法-【宝典训练】2023-2024学年七年级下册英语高效课堂课件（沪教牛津版）

Unit 6　Electricity 课时3　语法 目 录 01 课时精讲 02 课时过关 01 课时精讲 情态动词(Modal verbs) 情态动词本身有一定的词义，但要与动词原形一起使用，给谓语动词增添情感色彩，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。情态动词无人称和数的变化。常见的情态动词有十二个：may, might; can, could; will, would; shall, should; must, need, dare, ought to。在这一单元中，我们主要学习can, may 和must。 第 ‹#› 页 课时3　语法 返回目录 语法点一　can & cannot can 的基本意思是“能；会”，否定形式是cannot, 缩写为can't，意思是“不能”。 第 ‹#› 页 课时3　语法 返回目录 【解析1】表示能力(如体力和脑力方面)，意为“能；会”。如： Can you speak English？ 你会讲英语吗？ I can play the piano. 我会弹钢琴。 I can't write it well. 我写得不好。 【解析2】表示请求或允许，多用在口语中，意为“可以；能”。如： Can I help you？ 我能帮助你吗？ You can't play basketball. 你不能打篮球。 第 ‹#› 页 课时3　语法 返回目录 【拓展】 Can you…？表示“请你……好吗？” 表示说话人的请求；Can I…？表示“我可以……吗？”用来征求对方是否允许自己做某事。如在句末加上please一词就显得更有礼貌了。如： Can you help me, please？ 请你帮助我好吗？ 第 ‹#› 页 课时3　语法 返回目录 【解析3】表示推测，这一用法通常用于否定句或疑问句　如： What can he possibly mean？ 他可能会是什么意思呢？ 【拓展】 can与may都可以表示“许可”。在征求对方意见时用may较多，而且may显得更客气委婉一些。 第 ‹#› 页 课时3　语法 返回目录 语法点二　may & may not may 的基本意思是“可能；也许”，否定形式是may not。 【解析1】表示许可或征求对方的许可，常和can互换， 但 can 较随便，may 更正式。如： You may go now. 你现在可以走了。 May I use your computer？ 我能用一下你的电脑吗？ 第 ‹#› 页 课时3　语法 返回目录 【解析2】表示“可能”，常意为“也许；可能”，用于肯定句和否定句。如： He may not come here tomorrow. 他明天也许不会来这儿。 She may go to Shanghai next week. 下周她可能去上海。 【解析3】may的否定形式may not，也可用must not表达否定。如： —May I leave the book with you？我可以把这本书交给你吗？ —No, you mustn't. / No, you may not. 不可以。 第 ‹#› 页 课时3　语法 返回目录 语法点三　must & must not must 的基本意思是“必须”；否定形式是mustn't，表示“禁止”。 【解析1】表示“必须”。如： You must talk to them about their study. 你必须同他们谈谈关于他们学习的事。 【解析2】在否定结构中表示“禁止；不允许”。如： You mustn't leave here. 你不能离开这儿。 You mustn't take photos here! 这里禁止拍照！ 第 ‹#› 页 课时3　语法 返回目录 【解析3】表推测，意为“一定，准是”，比may更加肯定，用在肯定句；否定句中的推测要用“can't be”。如： He must be ill. He looks so pale. 他肯定是病了。他的脸色那么苍白。 My mother can't be at home. She is at work. 我的妈妈不可能在家，她在上班。 第 ‹#› 页 课时3　语法 返回目录 【解析4】must用于一般疑问句时，其肯定答语是“Yes, please”. 否定答语是“No, you needn't.”　如： —Must I finish my homework now？ 我现在必须完成作业吗？ —No, you needn't. 不，没必要。 第 ‹#› 页 课时3　语法 返回目录 02 课时过关 一、单项选择 (　　)1．—Must we hand in our exercises today？ —No, you __________. You can give them to me tomorrow. A．mustn't B．needn't C．shouldn't (　　)2．—Mum, may I go to my friend's birthday party？ —Certainly. But you __________ be back by ten o'clock. A．must B．can C．may B A 第 ‹#› 页 课时3　语法 返回目录 (　　)3．John, you needn't do your work today. If you're tired now, you __________ do it tomorrow. A．must B．may C．can (　　)4．—Susan has bought a large house with a swimming pool. —It __________ be very expensive. I have never even dreamt about it. A．must B．might C．can't C A 第 ‹#› 页 课时3　语法 返回目录 (　　)5．—Is the woman in white our manager？ —It __________ be her. She has just left for Shanghai. A．must B．may C．can't (　　)6．—Shall we go skateboarding after school？ —Sorry, my parents said that I __________ be at home early. A．can't B．must C．may C B 第 ‹#› 页 课时3　语法 返回目录 (　　)7．—May I watch TV for a while？ —No, you __________. You have to finish your homework first. A．should B．needn't C．mustn't (　　)8．—Can you play the piano？ —Yes, I __________. I often practise it on weekends. A．needn't B．need C．can C C 第 ‹#› 页 课时3　语法 返回目录 (　　)9．—Excuse me, where are we going to have our class meeting？ —I'm not sure. Ask our monitor, please. He __________ know. A．can B．may C．need (　　)10．— __________ you swim？　—Yes, but I'm not a good swimmer. A．Can B．May C．Need B A 第 ‹#› 页 课时3　语法 返回目录 二、用所给单词的适当形式完成句子 1．The TV set couldn't work without ___________(electrical). 2．The set of ________(cook) is made of plastic. 3．—How much are the two packs of ___________(battery)？　—Ten yuan, please. 4．You can buy many _______(bulb) in the shop. 5．—How many students passed the exam？　—Only three of _____ (they)． electricity cooker batteries bulbs them 第 ‹#› 页 课时3　语法 返回目录 6．The puzzle game is quite hard. Can you give me some ______(tip)？ 7．Be _________(care) of the dog. Don't get too close to it. 8．I _________(can) swim. Dad, can you teach me？ 9．The film was so _______(fun) that people in the cinema laughed all the time. 10．I can't __________(identify) who is the real King. tips careful funny identify can't 第 ‹#› 页 课时3　语法 返回目录 三、语法填空 阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或使用括号中词语的正确形式填空。 The summer vacation 1．____ (be)the best part of the year for most American children. Before the summer vacation comes, they make a plan to make sure they have 2．___ good trip. is a 第 ‹#› 页 课时3　语法 返回目录 Tom, an American boy, enjoys 3．___________ (travel) very much. This summer, he came along with his parents to Beijing 4．__________ (spend) their vacation. They made room reservations (房间预订) before they 5．_________ (arrive)．After arriving, they spent half a day in the hotel getting used to the time difference(时差)．Tom was too 6．_______ (exciting) to fall asleep that night. The next day, they began their five-day trip. They visited many places 7．____ interest such as the Ming Tombs and the Great Wall. During the trip, he posted a lot of 8．___________ (postcard) to his American friends. In the postcards he told 9．______ that he was satisfied with the trip. He is looking forward to coming to China again. 10．_______ an exciting trip! traveling to spend arrived excited of postcards them What 第 ‹#› 页 课时3　语法 返回目录 本节内容到此结束！ logo $$