集福“第二关”:语法福 Day 7专题01 情态动词的用法 【知识积累·练前热身】 (一)can的基本用法 ⑴ 表示体力或智力上的能力, 即“能够, 会”, 可与be able to转换。 例: He can speak English. = He is able to speak English. —Can you play basketball — No, I can’t. 如果表示将来具备的能力, 要用will be able to。 例: If I have a good sleep, I will be able to do the problem. ⑵ 表示许可, 主要用于口语, 书面语一般用may。 例: —Can we go home now, please — No, you can’t. You can only smoke in this room. You can’t keep the library books for more than a month. 与第一、二人称连用时, 还可以就可能的解决问题的方式或可能的行为提出建议。在这里, 也可用could使语气婉转。 例: Can / Could we meet again next week 下周我们可以再见面吗 —What shall we do 我们怎么办呢 — We can / could try asking Lucy for help. ———我们可以请露茜帮忙试试看。 You can / could help me with the cooking. 你可以帮我做饭。 ⑶ 表示否定推测“一定不是”, 一般用在否定句中。 例: Whose football is this It can’t belong to Mary ,because she doesn’t like playing football. 1.—Andy, _____ you hand in your science report before Friday —OK. No problem. A.can B.need C.must D.should 2.Dogs _____ provide company and reduce feelings of loneliness. A.can B.should C.must D.need 3.—Jim, could I use your computer —Yes, of course you _____. A.could B.can C.must D.should 4.—Kate, _____ I use your eraser —Sure, here it is. A.should B.must C.can D.need 5.This man _____ be my Dad. He has gone to America, and next month he’ll be back. A.mustn’t B.can’t C.might (二)may的基本用法 ⑴ 表示“许可”, 用can比较口语化。 例: You may / can come if you wish.如果你想来, 你就来。 You may not pick flowers in this park. 本公园内不许摘花。 (may not表示按规定不许可, 如果用mustn’t则表示说话人不许可。) —May I smoke here 我可以在这里抽烟吗 —No, you mustn’t. 不行。(mustn’t表示明确的禁止。) ⑵ 肯定句中表示推测, “可能”。 例: It may rain tomorrow. 明天可能会下雨。 The news may not be true. 这个消息可能不会是真的。 注意:如果在疑问句中表示“可能”, 通常用can。 例: Can it be true 那会是真的吗 Who can he be 他究竟是谁呢 ⑶ 【注意】:—May I/we…… —Yes, you may./—No, you mustn’t. 6.—Excuse me, _____ I feed the pet dog —Sorry, you can’t. A.would B.may C.must D.should 7.When you make a fresh salad, you _____ add your favorite fruit if you would like to. A.may B.should C.must D.have to 8.—Do you believe that personalities depend on star signs —It _____ be true, but don’t take it seriously. A.may B.must C.can’t D.shouldn’t 9.—What are you going to do this afternoon —I’m not sure. I _____ go to the library. A.must B.may C.mustn’t D.shouldn’t 10.—It’s our duty to protect the wild animals in our country, right —Of course! If we don’t protect them, they die out one day. A.can B.may C.need D.should (三)must的基本用法 ⑴ 表示必须, 强调说话人的主观意志。 例: I must go now, or I’ll be late. You must be here by ten o’clock. 【注意】:表示“必须“时, must的否 ... ...
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