1、Unit8 情态动词表推测一、用 must ,can/could，may/might, need, should 等表推测， 中考常见考点有：1.Must 可能性最大 100% ，只能用于肯定句 的推测，2.Can/could 可能性次之，一般用于 否定句或者疑问句 中的猜测，意为“不可能”或者“可能吗”,cant 可能性 0%.3.May /might 可能性较小，一般用于否定句或肯定句的猜测 “可能”二、情态动词表推测常用句型1.对 现在 事实的推测 情态动词+do sth 如 He must be at home now.2.对 过去 的事情推测 情态动词+have done 如 He
2、may have finished his homework.3.对 正在进行的事情推测 情态动词+be doing 如 The baby must be crying.4.there be 句型的推测 there must be如 There must be a river over there.三. Must 提问的回答A:Must I do.? B: Yes， you must.No， you neednt/you dont have to四.在反意疑问句中，当附属部分有推测意义的情态动词时，疑问部分应根据情态动词后面的情况来判断。如 He must be a worker, isnt
3、he用 must,may,might,may not 和 cant+do 或 be e.g.She must be at home now. The boy may play now. 推测用 must,may,might,may not 和 cant+have done e.g.She might have been ill yesterday. He must have hold the party. 情态动词 must, can, could, may, might表推测的用法 情态动词中的 must, can, could, may, might 都表推测。其中 must 的可能性最大
4、， can / could 次之，may / might 最小。具体用法如下：2.can / could 的用法 （1 ）can 表示推测“可能性”时，往往用于否定句或疑问句。（2 ）may, might 表推测时，可以用于否定句，意思是“可能不、也许不” ，但不用于疑问句。一 情态动词表示推测的用法及练习(must/cant/may might could) _表示一定;_ 表示可能;_ 表示不可能 二以 Must I 开头的句子；肯定回答：Yes,you_ 否定回答：No,you _ _ _/ No,you_. 1.Whose notebook is this? It _ Jims. It
5、 has his name on it.(2012 贵州) A. cant be B. must be C. can be 2. Is that your teacher? That _ be Mr. Wang. He has gone to Japan with his wife (2012 甘肃) A. cant B. mustnt C. may not 3. Is Maria knocking at the door? (2012 湖北) It _ be her. She is in Australia now. A. may not B. neednt C. mustnt D. can
6、t 4. Is Jim coming by train? (2012 四川凉山) Im not sure. He_ drive his car. A. must B. may C. need 5. I think the man over there must be Bob. it_ be him. he has _ to Australia.（2011 山东）A. cant；gone B. cant； been C. may not；been D. mustnt; gone 6 Is Mr. Brown driving here? (2008安徽中考) -Im not sure. He _
7、come by train.A. may B. shall C. need D. must 7 _ I finish my homework now?- No,you_.Your work is over today. A Cant;must B Must;dont have to C May couldnt D Couldnt;could1 John_ come to see us tonight, but he isnt very sure yet. A. may B. need C. cant D. must 2 John isnt in the classroom. He _ play
8、 soccer on the playground with Bob. A. can B. must C. should D. cant 3 That _not be her husband . She is still single. A. may B.can C. could D. might 4 You_ go and see a doctor at once because you got a fever. A. can B. must C. dare D. would 5 -Can you speak Japanese? -No, I_. A. mustnt B. cant C. n
9、eednt D. may not 6 -He_ be in the classroom, I think. -No, he _ be in the classroom. I saw him go home a minute ago. A can; may not B. must; may not C. may; cant D. may; mustnt 7 -Is Lena swimming in the pool? -No, she swim. She is terrified of water. A. may not B. must not C. cant D. neednt 8 He is
10、nt at school. I think he _ be ill. A. can B. shall C. must D. might 9 -What do you think “upset” means? - Im not sure. It mean “sad”. A may B. must C. can D. should 10 The children_ play football on the road. A cant B. can C. mustnt D. must 11.The road is wet . It _last night. A must rain B must have rained C could have rained D can have rained 12 He _you more help , even though he was busy .A might have given B might not give C may not have given D may give
