内容正文:
Unit 4 Don't eat in class.
Grammar Focus——祈使句、
情态动词 have to, must, can
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1. —Don't run in the hallways. —Don't fight.
2. —What are the rules? —We must be on time for class.
3. —Can we eat in the classroom? —No, we can't, but we can eat in the dining hall.
学霸智慧课堂·英语·七年级下册(RJ)
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4. —Can we wear a hat in class? —Yes, we can./No, we can't.
5. —Does he have to wear a uniform at school? —Yes, he does./No, he doesn't.
6. —What do you have to do? —We have to be quiet in the library.
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(一) 祈使句的用法:
1. 祈使句的含义: 表示命令、 请求、 建议或劝告的句子。 其主语 ____ 常省略, 谓语动词用 ______, 句末用 ________ 或句号, 读 ______。
you
原形
感叹号
降调
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2. 肯定的祈使句:
(1) ______ 原形+其他
(2) ____+n./adj.
(3) ____+宾语+动词原形+其他
3. 否定的祈使句: ______+动词原形
动词
Be
Let
Don't
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(二) 情态动词have to, must的用法:
1. have to意为 “________”, 有人称、 时态和数的变化, 其第三人称单数形式为 ________; 过去式为 ________; 否定式为don't/doesn't/didn't have to, 意为 “不必, 不需要”。
2. must意为 “_______”, 否定式为mustn't, 意为 “_______
_______”。
不得不
has to
had to
必须
禁止,
不可以
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(三) 情态动词can
在第一单元里我们学过can表示 “能力” 的用法, 而在 本单元中can表示 “许可”。can表 “能力” 的具体用法详见第一单元Grammar Focus。
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一、单项填空
( ) 1. (2023•鄂州改编)— I take photos here?
—Sorry, you can't. It's not allowed (允许) in the museum.
A. Must B. Need C. Can
C
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( ) 2. (2023•云南改编) —Excuse me, may I use my phone now?
—Sorry, you . The plane is taking off (起飞).
A. needn't B. can C. can't
( ) 3. (2023•恩施州改编) We look both ways when crossing the street.
A. may B. could C. must
C
C
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( ) 4. draw or write on the books in the bookstore, or you have to buy the books.
A. Don't B. Can't C. Isn't
( ) 5. —Allen, shall we go to the bookstore this afternoon?
—I'm sorry, David. But I meet my cousin at the train station.
A. can B. have to C. could