课件14张PPT。语法互动(八) 系动词和
情态动词语法互动(八)┃ 系动词和情态动词名 师 点 睛名师点睛考点过关 系动词不能独立作谓语,必须与表语一起构成谓语。情态动词和动词原形连用,一起构成谓语,没有人称和数的变化。常见考点如下:考点一 系动词常见的系动词有keep(保持), look(看起来), feel(觉得,摸起来), smell(闻起来), sound(听起来), taste(尝起来), become/grow/turn/get(变得)等。如:语法互动(八)┃ 系动词和情态动词He always kept silent at meeting.
他开会时总保持沉默。
He ________ very tired.
他看起来很累。
This kind of cloth________very soft.
这种布摸起来很软。
He became mad after that.
从那之后,他就疯了。looks feels 名师点睛考点过关语法互动(八)┃ 系动词和情态动词考点二 情态动词1.must的用法(1)在肯定句中表示“必须”。如:
When traffic lights are red, we must stop and wait.
红灯时我们必须停下来等。
(2)mustn't在否定句中表示“禁止”。如:
You mustn't play like that any more.The final exam is coming.
你千万别那样玩了,期末考试要到了。名师点睛考点过关语法互动(八)┃ 系动词和情态动词(3)must表示“推测”。 must用在肯定句中表示较有把握的推测,意为“一定”。如:
You have worked hard all day. You must be tired.
你辛苦工作一整天了,一定累了。
(4)由must引导的一般疑问句, 肯定答语要用must,否定回答用needn't/don't have to。如:
—Must we finish the work today?
我们今天必须完成这项工作吗?
—Yes, we must./No, we needn't.
是的,我们必须。/不,我们不必。名师点睛考点过关语法互动(八)┃ 系动词和情态动词(5)must和have to的区别:must 表示说话人的主观意愿,have to 表示客观需要。如:
I must do my homework first.
我必须先做作业。
It's late. I __________ go home.
天黑了,我不得不回家了。2.can与could的用法(1)can表示“能,会”,could是can的过去式。 如:
She can speak English and French.
她会说英语和法语。have to 名师点睛考点过关语法互动(八)┃ 系动词和情态动词(2)can和could都表示“请求许可”,could语气更委婉。如:
Could I have a cup of water?I am very thirsty.
我能喝一杯水吗?我很渴。
(3)can't表示“否定推测”。如:
—Listen! Is Tom singing in the classroom?
听!是汤姆在教室里唱歌吗?
—No. It can't be Tom. He has gone to Paris.
不,不可能是汤姆,他去巴黎了。名师点睛考点过关语法互动(八)┃ 系动词和情态动词3.had better的用法“had better+(not) do” 意为“最好(不)做……。” 如:
You had better ____________ wine because you have to drive back home.
你最好别喝酒,因为你还要开车回去。not drink 名师点睛考点过关语法互动(八)┃ 系动词和情态动词4.need的用法need 表示“需要”,多用于否定句和疑问句中,疑问句的肯定回答用must,否定回答用needn't。如:
You needn't worry about me. I feel much better now.你不必担心我,我现在感觉好多了。
—Need I clean the room now?
我现在需要打扫房间吗?
—Yes, you must./No, you___________.
是的,你必须打扫。/不,你不必。needn't 名师点睛考点过关语法互动(八)┃ 系动词和情态动词5.may的用法(1)may意为“可以”,表示请求或许可。如:
—May I use your pen?
我可以用用你的钢笔吗?
—Sure.Here you are.
当然,给你。
(2)may意为“也许”,表示推测,没有十足的把握。如:
He may come here by bus, I'm not sure.
他也许会乘公交车来这儿,我不确定。名师点睛考点过关语法互动(八)┃ 系动词和情态动词6.易错点(1)情态动词表推测:没有十足的把握用may, 有十足把握用must,否定推测用can't。
(2)mustn't 表示“禁止”,并非“不必须”。
(3)以must, need 开头的一般疑问句的回答。名师点睛考点过关语法互动(八)┃ 系动词和情态动词考 点 过 关1.[2013?兰州] —Look at the boy playing basketball on
the ground. Is it George?
—It ________ be him. He told me he would play
basketball after class, but he's not sure.
A.mustn't B. must C.can't D.may
2.—________I finish my homework now?
—No, you________. Your work is over today.
A.Can't; must B.Must; don't have to
C.May; couldn't D.Couldn't; couldD B 名师点睛考点过关语法互动(八)┃ 系动词和情态动词3.[2013?新疆] After a long walk, the old man ________
be tired now.
A.can't B.must C.has to D.need
4.—Must I finish the homework this afternoon?
—No,you ________. It can be finished before Friday.
A.can't B.mustn't
C.shouldn't D.needn't
5.I like soft and gentle music.It ________nice.
A.tastes B.looks C.feels D.sounds
B D D 名师点睛考点过关