中考英语《情态动词》专题复习课件

She daren`t go alone at night.
How dare you come again? Go if you dare.
9. need
表示“需要; 必要”, 用于疑问句、否定句和 条件状语从句。
You needn’t worry about me.
Need I give you a hand?
Need I help you if you get into trouble?
容易混淆的情态动词 用法区别
情态动词
主要用法
(could), 表示一般能力
can 只有现在式和过去式 can /could
can / could / be able to
用于多种时态， be able to was/were able to表示曾 经通过努力而做成某事
中考英语专题复习：
情态动词
Modal verbs
一、基本概念：
情态动词是表示可能、怀疑、愿望、 许诺、猜测等语气的动词。
二、 情态动词的基本用法
情态动词表示说话人的语气和情绪，其本身
词义不完整，不能单独作谓语，必须加上动词原
形一起才能构成谓语。情态动词没有人称和数的 变化（have to 除外），有些情态动词有过去式。 常见的情态动词有can, could, may, might, must, have to, shall, should, will, would, ought to, need, dare等。
含情态动词句型基本结构 陈述句 ： 主语+情态动词+ 动词原形
We should study hard.
一般疑问句 ： 情态动词+主语+ 动词原形
Байду номын сангаас
Can you help me?
特殊疑问句：特殊疑问词+情态动词+主 语+动词原形
What should I do?
考纲情态动词用法详解
1、can与could的用法
2）.表示“硬要；偏要”
If you must go home, at least call your mom.
4.will/would
1）.表示“请求; 建议”,用于疑问句。would比will
委婉、客气.
Will / Would you please open the window?
2）.表示意志或意愿
If he should be free yesterday, he would come to our party. 4）表示推测，意为“想必一定、照说应 该、估计”等。 He should be free by now.
7. ought to
1). 表示义务, 作“应当”讲, 语气比should强烈
He would stay up late when he was young.
4）.表示“注定会”
Fish will die without water.
5. shall
1).用于第一人称和第三人称的疑问句,
表示征求对方的意见.
Shall we go out for a walk?
Shall he wait for you at school?
I will help you.
He promised that he would do anything for you.
3）.表示习惯, will表示现在的习惯, 意为“总 是; 习惯于”。would表示过去的习惯性动作.
This kind of thing will happen.
这种事情总是要发生的
气更委婉.
—May I use the car ? —I’m afraid not. It might not be Jane. She hasn`t dicided to come here yet.
2).表示推测“可能”, could的可能性比can小。
3.must
1）.表示“必须; 应该” We must finish our homework everyday. 2）.表示“一定” The book must belong to Jim , there is his name on the cover.
6. should
1)表示劝告和建议, 意为“应该”
We should help each other. You should be polite to the old.
2)表示惊讶、意外, 作“竟然”讲
To my surprise you should not know about me.
3) 表示可能性很小, 但并非完全不可能，用于if 引 导的条件状语从句。
2).用于第二人称和三人称的陈述句, 表
示“命令、警告、允诺或威胁”.
You shall do as the teacher says.
(表示命令)
You shall receive my money tomorrow.
(表示允诺 )
He shall be sorry for his behavior one day, I tell you. (表示警告 )
1）.表示能力(could 指过去曾经的能力)。 She can play chess. He could drive before.
2).表示客观上或理论是的可能性。 It can rain heavily here, especially in summer.
3).表示请求、建议、允许、许可用could
As a student, you ought to study hard.
You oughtn’t to speak so much.
2). 表示含蓄或不完全肯定的推测, 意为“应该”或 “应是”
He ought to know my telephone number.
8. dare.
用于疑问句、否定句和条件状语从句中,表示 “敢; 敢于”。
比 can语气更委婉,回答用原形。
Could you tell me how I can get to the zoo?
4).表示推测“可能”(用于疑问句和否定句)
She can’t be our headmaster. She has gone to America.
2. may/might
1).表示请求、允许、许可, might比may的语