(
课件网) LESSON 1 LIVING IN A COMMUNITY UNIT 11 CONFLICT AND COMPROMISE LEARNING OBJECTIVES To find out the meaning of modal verbs in a sentence; To complete the text with the correct form of modal verbs; To learn the basic usage of modal verbs; To learn the special usage of modal verbs; To understand the usage and make sentences; To practise using modal verbs. KEY POINTS AND DIFFICULT POINTS To identify the meaning of modal verbs in a sentence; To complete the text with the correct form of modal verbs; To understand and remember the basic usage of modal verbs; To understand and remember the special usage of modal verbs; To practise using modal verbs correctly. GRAMMAR 情态动词 一、基本用法 1. ought to ought to 没有词形变化，通用于所有人称，可以用于现在时、过去时和将来时。否定式为 ought not（oughtn’t）to；疑问句把 ought 放在主语前。 （1）表示理应做的事、应该做的事，意为“应该，应当” You ought to study hard. （= It is your duty to study hard.） 你应该努力学习。 You ought to read the book. 你应该读这本书。 GRAMMAR 情态动词 1. ought to （2）表示推测，可译为“应是，应该，会是” He is honest, so what he said ought to be true. 他很诚实，因此他的话应该是真实的。 It is already twelve o’clock. Lunch ought to be ready. 现在已经 12 点了，午饭应该好了。 She ought to pass the test this time. 她这次应该能通过测试了。 GRAMMAR 情态动词 2. have to have to意为“不得不，必须”，其过去式为had to。 You don’t have to knock, just walk in. 你不必敲门一进来就是了。 He had to go to hospital for treatment. 他不得不去医院接受治疗。 表示“必须”时，must强调说话人的主观看法， 而have to则强调客观需要；must只有一般现在时，have to有更多的时态形式。 GRAMMAR 情态动词 3. dare （1）dare 作情态动词时，主要用于疑问句、否定句和条件状语从句，一般不用在肯定句中。 How dare you say I’m unfair! 你怎么敢说我不公平！ He daren’t speak English before such a crowd. 他在那么多人面前不敢说英语。 I dare not/daren't walk through the forest at night. 我不敢在夜里穿过森林。 GRAMMAR 情态动词 3. dare （2）dare 常用作实义动词，有时态、人称和数的变化，不同的是，作实义动词时，dare 后面可接带 to 或不带 to 的不定式。惯用短语 I dare say 意为“我想，大概”。 I dare say he is right. 我想他是对的。 I dare to swim across this river. 我敢游过这条河。 He does not dare (to) answer. 他不敢回答。 GRAMMAR 情态动词 4. need （1）need 可以作情态动词，need 和动词原形构成复合谓语，通常用于否定句、疑问句或条件句中，无人称和数的变化。 You needn't do it again. 你不需要再做了。 He needn't worry about it. 这件事他无需担心。 You need not tell the entire truth, but you must not lie. 你不必说出全部真相，但你一定不许撒谎。 GRAMMAR 情态动词 4. need （2）need 也可以作实义动词，用于肯定句、疑问句和否定句中。need后跟不定式或名 / 代词作宾语，有人称和数的变化，其变化与一般动词相同。 I need some help. 我需要一些帮助。 She needs to see a doctor. 她需要去看医生。 We need to finish this project by the end of the week. 我们需要在本周末之前完成这个项目。 GRAMMAR 情态动词 4. need （3 ... ...
