The usage of need need 有普通动词和情态动词两种用法。①普通动词用法:need to do 或 need doing;②情态动词用法(在疑问句中和否定句中常用情态动词用法):needn’t do, need I. 课文中的You just need to listen for key words,此时的need是普通动词的用法。 1 普通动词: Everybody needs to rest need经常用作普通动词:第三人称单数加-s,疑问句和否定句加do. need后面通常跟带to的动词不定式。 Everybody needs to rest sometimes. 人人都需要有休息的时候。 Do we need to reserve seats on the train? 我们需要预订火车座位吗? 如果主语和need 后的动词是被动关系need doing. That sofa needs cleaning again.(=…needs to be cleaned…) 那张沙发又需要清洗一下了。 2 情态助动词形式:he needn't; need I? need也可以以现在时形式用作情态助动词:第三人称单数不加-s,疑问句和否定句不加do.在这种情况下,need之后一般跟不带to。这种用法主要用于否定句(needn't);但也可以用在疑问句中。 She needn't reserve a seat - there'll be plenty of room. 她不需要预订座位——座位多的是。 Need I fill in a form?我需要填表吗? 题: Does he need read this book? A. to B. × [选A,因为用助动词Does 来提问,说明此时的need 是行为动词用法,行为用词用法是need to do sth.] Need she sing ? A. to B. × [选B,因为用need 来提问,说明此时的need 是情态动词用法,情态动词后是动词原形] 3.need not和 must not need not和do not need to表示不必做某事;must not则表示一定不要做某事。试比较: You needn't tell Jennifer - she already knows. 你不用告诉珍妮弗了——她已经知道了。 You mustn't tell Margaret -I don't want her to know. 你一定不要告诉玛格丽特——我不想让她知道。 need not有时也表示某事不一定真实。 She looks quite…. I'm sure it is flu.~It needn't be——maybe she's just over-tired. 她看上去病得很重。肯定是得了流感。~那可不一定——也许只是劳累过度了。 4.need做为名词There's no need to hurry ,we've got plenty of time. 没有必要急匆匆的,我们有足够的时间。 本文来源:https://www.wddqw.com/doc/d8d3a677e45c3b3567ec8bfc.html