Unit 7 When Disaster Strikes 语法 课件(共12张PPT) 中职英语外研版(2021)基础模块1

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Unit 7 When Disaster Strikes 语法 课件(共12张PPT) 中职英语外研版(2021)基础模块1

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(共12张PPT)
Unit 7 When Disaster Strikes
Modal Verb
When Disaster Strikes
Learning Objectives
To learn and master the basic characteristics of modal verb.
To master the basic usages of common modal verbs--- can, could, must, may, might, should, need, etc.
When Disaster Strikes
We should make some preparations.
I’m sure he can do something to help me out.
Yet how many lives could be saved if we did more to prevent natural disasters
When Disaster Strikes
情态动词两个基本特点是:
01
02
没有人称和数的变化
后接动词原形
When Disaster Strikes
常见情态动词的词义:
can/could
be able to
may/might
must
have to
need
dare
shall/should
能够
可以, 可能, 祝愿 
不得不

能够 
必须
需要
征求意见, 应该, 竟然
When Disaster Strikes
group 1
分类 内容 否定 疑问及回答
can 1.表现在或将来的能力,译为“能够” I can speak fluent English. can’t Can…?
Yes, …can.
No, …can’t.
2.表允许,译为“可以”(= may) You can go now. could 1.表过去的能力, 译为“能够” I could speak English 10 years ago.我十年前就会讲英语了。 couldn’t Could…?
Yes, …could.
No, …couldn’t.
2.表允许(比can更委婉、更礼貌),译为“可以” Could I use your pen?我可以用一下你的钢笔吗? be able to 1.强调是经过一番努力后才有的能力(can一般指天生就具备的能力) I was able to swim with the help of the coach.在教练的帮助下我能够游泳。 Fish can swim.鱼会游水。 be not able to Be…able to…?
Yes, …be.
No, …be not.
2.can/could只用于一般过去、一般现在和一般将来时, 其他时态只能用be able to。 He hasn’t been able to sleep recently.他近来难于入睡。
When Disaster Strikes
group 2
分 类 内 容 否 定 疑问及回答
may/might 1.表许可 May I come in?我可以进来吗? may not might not May…?
Yes, …may/can.
Yes, please.
No, …mustn’t.
No, …can’t.
No, …had better not.
2.表征求对方的意见(might比may更委婉,不表时态) Might I keep your book for another week?你的书我可以再借用一个星期吗? 3.表祝愿 May you succeed.祝你成功。 May you enjoy your life.愿你享受生活。
When Disaster Strikes
group 3
分 类 内 容 否 定 疑问及回答
must 必须 You must wear a mask in crowded public places like airports and railway stations.在机场和火车站等人多拥挤的公共场所必须戴口罩。 don’t have to 或 needn’t Must…?
Yes, …must.
No, …needn’t/don’t have to.
have to 不得不 My parents are at work,so I have to take care of my little sister.我父母都在工作,所以我必须照看我的妹妹。 don’t have to 或needn’t Do…have to…?
Yes, …have to/must.
No,…needn’t/don’t have to.
When Disaster Strikes
group 4
分 类 内 容 否 定 疑问及回答
need 意为 “需要” You needn't go there today.你今天不必去那里。 needn’t Need…?
Yes, …must.
No, …needn’t/don’t have to.
dare 意为“敢” He dare not ask her out.他不敢约她外出。 dare not=daren’t Dare…?
Yes, …dare.
No, …dare not.
When Disaster Strikes
group 5
分 类 内 容 否 定 疑问及回答
shall/should 1.用于第一、第三人称, 表征求意见 Shall we dance 我们跳个舞好吗 shall not shan’t shouldn't Shall we go to the museum 问的是“我们”中的一个, 应回答“Sure/Good idea”。
Shall we go to play basketball, mum?
本句问的是除“我们”以外的人, 则回答“Yes.you can/may. ”或者“Sorry, you can’t. ”。
以“Shall you…”句式提问的, 回答用“Yes, I will./No, I won’t. ”。
2.用于第二、第三人称,表说话人给对方的承诺、决心、威胁和命令。 Be good and you shall get a computer as a reward.好好表现,你将得到一台电脑作为奖赏。
When Disaster Strikes
Summary
1. the fundamental features of Modal Verb
2. the usage of common Modal Verbs
Thank you!
Unit 7 When Disaster Strikes

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