1、九年级全册九年级全册Unit8Unit8 语法专题语法专题情态动词表示推测的用法单元语法专题单元语法专题1情态动词must“一定；肯定”表示肯定猜测She must be a teacher.Sam has been worked for four hours.He must be tired.must 用在肯定句中注意：mustnt表示“禁止”Mum,may I go out with my friends tonight?No,you mustnt.2情态动词can的否定形式：cant“不可能”表示肯定猜测She cant be a teacher.She cant be at home
2、now.I just saw her in the school library.cant 用在否定句中3情态动词：may,might,could“可能”表示不确定的猜测She may be a teacher.The dictionary might be Jennys.The book guitar could be Jenny.She plays the guitar.辨析She may be a teacher.Maybe,you are right.may bemaybe情态动词+be动词副词谓语结构He may be in the office.Maybe he is in the
3、 office.根据中文提示完成句子：根据中文提示完成句子：1.他一定是你的叔叔。（must）_2.“吉娜在哪里？”“我不确定，她可能在家吧。”_3.那个女人不可能是你的新老师，她是我们的新老师。_4.她一定正在赶公交车。_5.一定是有人拿走了我的雨伞。_He must be your uncle.Where is Gina?I dont know.She may be at home.That woman cant be your new teacher.She is our new teacher.She must be running after a bus.Someone must h
4、ave taken away my umbrella.选择合适的情态动词填空：选择合适的情态动词填空：must,cant,may,might,couldmust,cant,may,might,could1.That scarf _ be expensive because it is made of silk.2.Is the girl Jenny?It _ be her.She has gone to the library.3.Can I hang out with my friends,Mom?Of course,but you _ be home by 9 oclock.4.Look
5、at the hat on the chair.Is it Toms?It_ belong to him.I saw him go out with hat.mustcantmustcant选择合适的情态动词填空：选择合适的情态动词填空：must,cant,may,might,couldmust,cant,may,might,could5.Where are you going on vacation?I _ go to Nanning.But I am not sure now.6.I cant find my wallet anywhere.You _ have lost it while
6、 you are on the way to school.mightcouldcouldmaymight may选择题：选择题：1.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;mustnt D.may;cant2.Whose book is this?It _ our geography teachers.You see,his name is on it.A.cant be B.can
7、be C.mustnt be D.must be D D选择题：选择题：3.Difficulties always go with me!Cheer up!If God closes a door in front of you,there _ be a window opened for you.A.would B.must C.could D.can4.Whose T-shirt is this?It _ be Johns.Its _ small for him.A.cant;much too B.cant;too much C.mustnt;too muchBA选择题：选择题：5.Is
8、that girl in red Sally?No,it _ her.She has gone to Hong Kong.A.may be B.must be C.cant be6.The blue coat _ be Tonys.He never wears blue clothes.A.can B.must C.cant D.mustntCC选择题：选择题：7.Oh,its raining hard.Be careful!The road _ be wet.A.could B.must C.might8.Two hundred years for such a T-shirt!You _ be joking.A.cant B.can C.need D.mustBD选择题：选择题：9.Do you have any plans for this weekend?Im mot sure.I go_ climbing Mount Yuntai.A.must B.need C.may D.can10.In competition,as in life,you _ not always win.A.may B.can C.must CATHANK YOU
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