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情情 态态 动动 词词 常见的情态动词有常见的情态动词有: can , could , may , might , must , need , have to , should 等等. 所有的情态动词后面都接所有的情态动词后面都接动词原形动词原形. Eg: I can swim . He has to go now . 1. can 能够能够,会会,可以可以 Eg: 1. I can speak English well . 2.Can you tell me how to start the machine?此外此外, can 用来表示用来表示否定否定推测和推测和疑问疑问推测推测 Eg:1. That cant be our English teacher because she has gone to Shanghai . 2.Can it be true ?2. may 可以可以,可能可能,也许也许 Eg: You may go with me . - May I borrow your pen ? - Yes , you may . No , you _ cant / mustnt . 此外此外, may 表示可能时注意和表示可能时注意和 maybe 的区别的区别 maybe 可能可能(副词副词),不能做谓语不能做谓语,常在前面常在前面 Eg: Maybe you know the old man . = You may know the old man . may 常放在句中常放在句中,和动词原形一起做谓语和动词原形一起做谓语 1) I dont know. _he can tell you. 2) I dont know. He _tell you . Maybe may3. must 必须必须 mustnt 严禁严禁,禁止禁止,不许不许 Eg: I must learn how to work . You mustnt play in the street . - Must I finish the work now ? - Yes , you must . No, you neednt / dont have to(不必）不必）. 此外此外 must 用于肯定推测用于肯定推测,表示表示 肯定是肯定是 Eg: The book must belong to him because we can see his name on it .4. need (需要需要) 既可做实义动词既可做实义动词也可做情态动词也可做情态动词1)实义动词实义动词 need to do sth 需要做某事需要做某事 Eg: I need to buy a big house . - Do you need to buy a big house ? - Yes , I do . No, I dont .2) 情态动词情态动词 need do sth 需要做某事需要做某事 Eg: I need buy a big house .5. have to 不得不不得不 Eg: Its eleven oclock . I have to go now . 请注意请注意: I dont have to go now . have to 和和 must 的区别的区别: have to 表示客观因素表示客观因素 Eg: We are very glad at the party , but its 11 , so we have to leave now . must 表示主观因素表示主观因素 Eg: We must study hard to find a good job for ourselves .
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