
第04讲 八年级下册Unit 2 Stay Healthy语法、写作篇 (寒假预习讲义) 内容导航———预习三步曲 第一步:学 析教材 学知识:教材精讲精析、全方位预习 练习题 讲典例:教材习题学解题、快速掌握解题方法 练考点 强知识:核心考点精准练 第二步:记 串知识 识框架:思维导图助力掌握知识框架、学习目标复核内容掌握 第三步:测 过关测 稳提升:小试牛刀检测预习效果、查漏补缺快速提升 语法1(情态动词should和could的用法) 知识点1. should的用法 should作情态动词,有实际的词义,但它不可单独作谓语,须与动词原形连用,没有人称和数的变化。其否定形式是should not,可缩写为shouldn’t;变为一般疑问句时,should提到主语之前。它的用法如下: (1)表示提出或征询建议,意为“应该”。 I think you should save some money for your father’s birthday. 我认为你应该为你父亲的生日攒些钱。 (2)表示责任或义务,意为“应该,应当”。 We should follow the rules in public. 在公共场合我们应该遵守规则。 (3)表示推测,意为“照理说,应该”,语气弱于must“一定”(表示推测)。 Don’t worry. Kate should arrive soon. 别担心。凯特应该很快就到了。 知识点2. could的用法 情态动词could本身不能作谓语,必须和动词原形一起构成谓语。用法如下: (1)could用于提出建议,比can语气更为委婉。 You could ask your doctor for a check-up. 你可以请医生做个检查。 (2)句型“Could you (please)... ”常用于委婉地请求某人做某事,其后通常接动词原形,此时其肯定回答和否定回答都不用could。 肯定回答:Yes, I can./Sure./Of course./No problem./... 否定回答:Sorry, I’m afraid not./I’m sorry, I can’t. /I’m sorry, but.../Of course not. —Could you lend your computer to me 你可以把你的电脑借给我吗 —Certainly. 当然可以。/Sorry, I’m afraid not. 对不起,恐怕不行。 (3)句型“Could I do... ”常用于委婉地请求许可,答语中用can,而不用could。 肯定回答:Yes, you can./Certainly./Sure. 否定回答:No, you can’t./Sorry, I’m afraid you can’t. —Could I have a look at your new watch 我能看看你的新手表吗? —Sure. 当然可以。/No, you can’t. 不,不行。 随堂训练 1.—What _____ I do when my parents don’t agree with me —You _____ talk with them and let them know your thoughts. A.needn’t; should B.could; shouldn’t C.can; can’t D.should; can 2.You _____ drink warm water and have a good rest if you have a cold, or you’ll feel worse. A.should B.had better not C.mustn’t D.can 3.—Miss Fang, how can I speak good English —I think you _____ practise speaking it every day. A.wouldn’t B.shouldn’t C.should D.would 4.Yes, Jasmine. First, you _____ always focus on what the teacher says in class. Take notes when you need to. A.may B.may not C.should D.shouldn’t 5.Sweetie, your room looks like a bomb went off in here! You _____ tidy it up right now. A.may B.can C.should D.need 6.Mom, I want to borrow Lucy’s storybook. _____ you help me ask her tomorrow A.Must B.Could C.Should D.Might 7._____ you turn down the TV, please I’m trying to work. A.Could B.Must C.Need D.Might 8.—_____ I hang out with my friends after dinner, Mum —Sure. Remember to go back home before 9:00. A.Must B.Could C.Need D.Should 9.—_____ you please play tennis wit ... ...
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