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1、情情 態(tài)態(tài) 動動 詞詞 常見的情態(tài)動詞有常見的情態(tài)動詞有: can , could , may , might , must , need , have to , should 等等. 所有的情態(tài)動詞后面都接所有的情態(tài)動詞后面都接動詞原形動詞原形. Eg: I can swim . He has to go now . 1. can 能夠能夠,會會,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 用來表示用來表示否定否定推測和推測和疑問疑問推測推測 Eg:1.

2、 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,也許也許 Eg: You may go with me . - May I borrow your pen ? - Yes , you may . No , you _ cant / mustnt . 此外此外, may 表示可能時注意和表示可能時注意和 maybe 的區(qū)別的區(qū)別 maybe 可能可能(副詞副詞),不能做謂語不能做謂語,常在前面常在前面 Eg: Maybe you know

3、 the old man . = You may know the old man . may 常放在句中常放在句中,和動詞原形一起做謂語和動詞原形一起做謂語 1) I dont know. _he can tell you. 2) I dont know. He _tell you . Maybe may3. must 必須必須 mustnt 嚴禁嚴禁,禁止禁止,不許不許 Eg: I must learn how to work . You mustnt play in the street . - Must I finish the work now ? - Yes , you must

4、. No, you neednt / dont have to(不必）不必）. 此外此外 must 用于肯定推測用于肯定推測,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) 既可做實義動詞既可做實義動詞也可做情態(tài)動詞也可做情態(tài)動詞1)實義動詞實義動詞 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 d

5、o . No, I dont .2) 情態(tài)動詞情態(tài)動詞 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 . 請注意請注意: I dont have to go now . have to 和和 must 的區(qū)別的區(qū)別: have to 表示客觀因素表示客觀因素 Eg: We are very glad at the party , but its 11 , so we have to leave now . must 表示主觀因素表示主觀因素 Eg: We must study hard to find a good job for ourselves .