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1、情态动词主要用法情态动词主要用法: 一. can 的用法: 1.表能力 2.表示可能性 3.表示同意做某事,意为 “允许”, “可以” 4.表推测(主要用于否定句,疑问句) He cant speak Chinese. (表示能力) Can I smoke here? (表示许可) Anybody can make mistakes.(表示可能)二. must 的用法 1.表示按命令、规定、责任等必须要做的事。 在回答由 must 引导的一般疑问句时,如果表示肯定,用 must;如果表示否定,必须 用 neednt。 -Must I copy it now? -Yes, you must. (
2、No, you neednt.) 2. 表示肯定的推测,意为”一定会”, “一定是”,多用于肯定句。三. need 的用法 need 作为情态动词使用时,多用于疑问句和否定句,后跟动词原形;作为行为 动词时,后跟带 to 的动词不定式。neednt 意思是“不必”。 他需要去看医生。He _ see a doctor. 四 may 的用法 1.表示“可以” ,用以询问或说明可否做某事。 2.用于表推测某事可能发生或某情况可能存在,意为 “可能”。情态动词练习:情态动词练习: ( )1-Susans parents have bought a large house with a swimmin
3、g pool. -It _ be very expensive. Amust Bcan Cmustnt D、cant ( )2The notebook_ belong to SarahHer name is on the coverAmight Bcant Cmust Dmustnt ( )3.- May I put my bike here?- No,you_You should put it over thereAcouldnt Bneednt Cmustnt Dwont ( )4Boys,you_ be sitting in this roomIt is for your teacher
4、s onlyAshouldnt Bdont have to Cwont Dneednt ( )5-Whose pizza is this?-I think it_ be mineIm the only one who ordered a pizzaAmust Bcould Cmight Dcant ( ) 6. My brother cant sing but he _ play the piano.A. cant B. doesnt C. can D. dont ( )7. You look tired. You _ to have a good rest.A. must B. may C.
5、 should D. need ( ) 8.- Why do you think the man is running ? -He _ be _ for exercise because he is wearing a suit . A. must , running B. cant ; run C. cant ; running D. could ; running ( )9. -Mum , Ive been studying English since 8 oclock. _ I go out and play with Tom for a while?-No, Im afraid not. Besides, its raining outside now. A. Cant B. Wouldnt C. May not D. Wont