dare 和need的用法

dare 和need的用法 need和dare的用法 dare和need既可作情态动词又可作实义动词用。在高一上学期这两个词出现较 为频繁，而同学们经常混淆，现介绍一下这两个词的用法: 1. 作情态动词时，常用于否定句、疑问句或条件句中。 2. 在肯定句中，常用作实义动词，构成疑问和否定需借助do(does，did)， need后面常接带to的不定式，而dare后偶尔可省略to。need示“需要”，且 其主语是后面动词的宾语时，其后的动词既可用动名词一般体主动态表示被动含 义，也可用不定式一般时的被动语态。 3. 两词如作情态动词，则没有第三人称单数形式和过去式形式，构成疑问 句时，将其移至句首，构成否定句时，直接在其后加not。 1) You needn't come to the meeting this afternoon if you have something important to do. 2) You don't need to go there if you have no time. 3) Having broken a vase，the boy stood still without daring raise his head. 4) The library needs cleaning (to be cleaned)，but it'll have to wait until Sunday. 5) 1 wondered how he dared say that to the teacher. 更多例句: 1. 用作情态动词 --Need I come? --Yes, you must. --我需要来吗, --需要。 You needn’t telephone him now. 你现在不必打电话给他。 I don’t think you need worry. 我想你不必发愁。 She dare not go out alone at night. 她晚上不敢一个人出去。 How dare you say I’m unfair? 你竟敢说我不公平, Not one of them dared mention this. 他们谁也不敢提这件事。 2. 用作实义动词 You don’t need to do it yourself. 你不必亲自做这件事。 We need to tell them the news. 我们需要把这消息告诉他们。 The table needs painting (to be painted.). 桌子需要油漆一下。 We should dare to give our own opinion. 我们要敢于提出自己的观点。 He did not dare (to) look up. 他不敢抬头看。 I dare day he’ll come again. 我想他会再来的。 (I dare say…为固定习语)