2017年成人英语三级考试《词汇与语法》专项备考资料5

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2017年成人英语三级考试《词汇与语法》专项备考资料5
2017年成人英语三级考试《词汇与语法》专项备考资料5成人英语三级考试
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  • 1、can

    1)表能力时意味着凭体力或脑力或技术等可以无甚阻力地去做某事。

    I can climb this pole. 我能爬这根杆子。

    He is only four, but he can read. 他只有4岁,但已认得字了。

    2)表示推测语气的用法时,can只能用于疑问句和否定句,用于否定句的时候必须要有充分的理由说明。如:

    Can he be at home? No, he can't be at home, because I met him in the street just 5 minutes ago.

    他可能在家吗?不,他不可能在家,因为我5分钟之前才在街上遇到他。

    2、may (might)

    1)表示请求、可以、允许。

    You may drive the tractor. 你可以开那台拖拉机。

    2)表建议(可和as well 连用)

    You may (might) as well stay where you are.

    你还是原地待着好。(may as well 有“还是……的好”的含义)

    3)表可能(事实上)。可以指过去时间,也可以指现在时间,但语气更加不肯定,只能用于肯定句和否定句。

    He may be at home. 他可能在家。

    She may not know about it. 她可能不知道这件事。

    He was afraid they might not agree with him. 他担心他们可能不同意他的意见。

    They might be having a meeting, but I'm not sure. 他们有可能在开会,不过我不肯定。

    3、must

    1)表示必须、必要

    We must do everything step by step. 我们必须按部就班地做一切事情。

    2)must 的否定式有两个:当回答由must引起的问题时,否定答复要用needn't或don't have to表示“不必”、“无须”、“用不着”

    3)表示推测语气的用法,意为“准是、一定”等,只用于肯定句,并且要有充足的理由说明。

    He must have passed the exam, because he looked so happy.

    他一定通过考试了,因为他看起来如此的开心。

    4. have to

    have to的含义与must是很接近的,只是have to 比较强调客观需要,must着重说明主观看法。

    I must clean the room.(主观想法)I have to clean the room.(客观需要)

    另外,have to 能用于更多时态:

    We had to be there at ten. 我们得在十点钟到那里。

    We will have to reconsider the whole thing. 这一切我们将不得不重新加以考虑。

    have to 的否定式:don't have to do 表示“不必做……”之意。

    5、would

    1)表意愿。

    They would not let him in because he was poorly dressed. 他们不让他进去因为他衣着破旧。

    I said I would do anything for you. 我说过我愿意为你做任何事。

    2)表过去反复发生的动作或过去的一种倾向。

    Every time she was in trouble, she would go to him for help.

    她每遇到麻烦都会向她求助。他告诉我盒子打不开了。

    6、ought to

    表义务,意为“应该”(因责任、义务等该做),口气比should稍重。

    You are his father. You ought to take care of him. 你是他父亲,应当管他。

    You oughtn't to smoke so much. 你不应该抽这么多烟。

    7、used to

    表示过去的习惯动作或状态,现在不复发生或存在。疑问式和否定式有两种。

    He used to live in the countryside, but now he lives in the city.他过去住在乡下,现在住在城里。

    There used to be a building at the street corner, but it has been pulled down.

    街道拐角处过去有座楼房,现在拆了。

    I usedn't (didn't use) to smoke. 我过去不抽烟。

    Used you (Did you use) to go to school on foot? 你过去常步行去学校吗?成人英语三级考试