Need和dare的用法小结与练习含答案

Need/Dare的用法与练习（含答案）Need的用法1. need作情态动词need作情态动词用时，主要用于否定句和疑问句中，形式为need not原形动词。(need辅助后面实义动词，有一定的词义，但不能独立使用)例：You need not hand in the paper this week. 情态助动词 + 主动词主语 + 复合谓语 + 宾语 + 状语注意用need 提问时，肯定回答为 must，否定回答为 neednt或dont have to。 例：Need I finish the work today? （need助动词）Yes, you must .是的。No. you neednt /dont have to. 不， 你不必。2. need作实义动词作实义动词，need和普通动词一样，有人称、数和时态的变化，后接名词、代词、不定式或动名词做宾语，可用于任何句子。need肯定陈述句中独立做谓语，而疑问和否定则要借助于do构成。如：Do you need a dictionary? 你需要词典吗?1）如果主语是人，句型如下： sb. need(s) sth. 某人需要某物sb. need to do sth. 某人需要去做某事例： I need to pass the exam. 我需要通过这次考试。He needs to learn English .他需要学习英语。You need my help. 你需要我的帮助 主语+谓语+ 宾语2）如果主语为某物某物需要某种方法处理时，need之后可接不定式短语，但一定为被动语态；也接doing，但一定为主动语态。句型如下：Sth. need doing 某事需要被做= need to be done特别注意两点：.主动形式的动名词doing具有被动的含义；也接动名词，但一定为主动语态。.该动名词可以改为其动词不定式的被动形式而句子的意义不变。例如：.例： The flowers need watering. = The flowers need to be watered. 这些花需要浇水。同理：The window needs to be fixed.（ 正确 ）=The window needs fixing（ 正确 ）（这窗子需要修理。）The window needs being fixed（错误 ）3. 表过去状况时a. didnt need to原形动词 表示 “当时不必 （而且亦未如此做）”，直陈语气例：He didnt need to attend the party, so he stayed home.（当时他不必参加派对，所以就留在家里。）b. need not have过去分词 表示 “当时不必 （但却如此做）” 例：He neednt have attended the party, but he went there just the same.（当时他可以不必参加派对，但他还是去了。）后者也就是虚拟语气： neednt +完成式 “表示本来不必做某事而实际上做了某事”。例：You neednt have waited for me.4. 注意need在反意疑问句中的变化a实义动词，就是一般动词，需要加do/does/did构成。例：He needs to go, doesnt he? （needs为动词）（他需要去，不是吗？)He doesnt need to go, does he?（他不必去，对吧？)b情态动词，直接用need构成例：He need not go, need he? ( need与not连用，情态动词，就是助动词）（他不必去，对吗？)Dare的用法（语法成分与need相同）1. dare作情态动词作情态动词用时, 常用于疑问句、否定句和if/whether从句中, 没有人称和数的变化，但是有过去式（dared），后接动词原形。例： How dare you say Im unfair? He darent speak English before such a crowd, dare he? If we dared not go there that day, we couldnt get the beautiful flowers.I wonder whether he dare do it.反意疑问句中：He darent speak English before such a crowd, dare he?2. dare作实义动词 可作实义动词用时，即一般动词，具有人称、时态和数的变化。在肯定句中，dare后面常接带to的不定式。在疑问句和否定句中，dare后面可接带to或不带to的不定式。例：Do you dare to walk in the dark? 你敢黑夜走路吗？ He doesnt dare (to) meet his teachers eyes. 他不敢与老师对视。 He dared to go.（当时他敢去。）3. 习惯用法：a. I daresay + (that）从句我敢说 (daresay是一个词，亦可作dare say)例：1 daresay he will be late again.（我敢说他又会迟到。） b. How dare + 一般陈述句? 怎敢 ？例：How dare you say such a thing to me?（你怎敢在我面前说这种话？)练习1. You _ worry about me. Its nothing serious. A. cantB. mustntC. needntD. wont2. What a beautiful day! You _ take your umbrella at all. A. cantB. needntC. mustntD. may not3. -Must I return the book by the end of next month? -_. you can keep it as long as you like. A. No, you mustnt B. No, you cantC. Yes, you have toD. No, you neednt4. My little son _ out alone at right. A. dare not to goB. dares not to goC. doesnt dare to goD. dares not go5. -Sorry, I am late. -Why, you _ to the company today, for it is Sunday. A. couldnt have comeB. neednt have comeC. neednt comeD. didnt need to come6. -Do you want to buy a big apartment? -Well, it _ be big -thats not important. A. mustntB. needntC. cantD. wont7. Afte