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课件网) MODAL VERBS To learn about and practise modal verbs Find out what the modal verb in each sentence means. 1. Ma Ming… had to pack his bags. ( ) 2. They couldn’t relax or read a book without plugging their ears. ( ) 3. We told him that he ought to cease drumming or leave the property… ( ) 4. …and I don’t have to do my own washing! ( ) 5. …we dared not go onto our balcony… ( ) a It is necessary to do this (there is no choice). b It is not necessary to do this (there is some choice). c It is impossible to do this. d It is risky or dangerous to do this. e It is sensible to do this. a c e b d Modal verbs can be used with another verb to express likelihood, ability, permission and obligation. 情态动词 情态动词和动词原形连用，表达可能性、能力、许可和责任等。 情态动词表示说话人的情绪、态度或语气。 情态动词其主要特征有： 1. 有一定的词义，但不能单独作谓语，需要和行为动词或连系动词连用构成谓语； 2. 不受主语人称和数的变化影响（have to / be able to除外）； 3. 后接动词原形，即不带to的不定式（ought to／used to / have to作固定词组看待）。否定式构成是在情态动词后面加“not”。 情态动词 用法 例句 ought to 1. to show duty or moral obligation 表示职责或道义上的责任 You really ought to visit your grandmother. You know she hasn’t been well. We ought to give more assistance to charities in need of funding. 2. to show necessity 表示必要性 You ought to go to bed early as you have to be up at six. 3. to make a suggestion 提出某种建议 You really ought to try this diet. I have lost five kilograms. ought to 情态动词 用法 例句 could 1. to express possibility 表示可能性 If our defence is good in the next game, we could even win. 2. as the past tense of can 作为can的过去式 I could swim for hours when I was younger. 3. to show that something is possible in the future, but not certain 表示某事将来有可能要发生，但不确定 If we get good rains then we could have a bumper crop. could 情态动词 用法 例句 could 4. as a polite or formal way of asking someone to do something or to ask for permission to do something 礼貌地或正式地请求他人做某事或请求允许做某事 Could you pass me the salt, please Could I ask you a question Could you run up to the office and deliver this message, please 情态动词 用法 例句 could 5. to show that something is / was possible now or at some time in the past 表示某事在现在或过去的某个时间里可能发生 It is so relaxing that I could just sit in the sun and read all day. I was so hungry that I could have eaten the whole cake! 6. as a suggestion when asked what to 在被问起要做某事时，表示建议 We could go to Chen Xi’s house first and then go on to the game. 情态动词 用法 例句 dare to to say we are brave enough to do something. 表示敢于做某事 Only the fittest long-distance runners dare to tackle the Comrades Marathon. I was so worried about my exam results that I didn’t dare to ask if I had passed. Only a few journalists dared to cover the story. dare to have to 情态动词 用法 例句 have to 1. to show ob ... ...
