need是实义动词or情态动词

needneed 是实义动词是实义动词 oror 情态动词 情态动词 来源 网络资源 2011 04 02 15 15 54 标签 动词 情态动词 小学精华资讯小学精华资讯 免费订阅免费订阅 need 作实义动词 On the one hand it can be used as an ordinary verb and has the same forms as an ordinary verb The third person singular ends with an s and questions an d negatives are formed with do As an ordinary verb need is normally followed by an infinitive with to 一方面 need 可用作实义动词 此时它的用法跟其他动词一样 第三人称单数作主语 时加 s 疑问句和否定句用 do 来构成 做实义动词时 need 一般接带 to 的不定式 例句 A He needs to see a doctor Do you need to see one too A 他要去看医生 你要去吗 B No I don t need to see a doctor But I need a good rest B 不 我不需要看医生 但我要好好休息一下 In this sense when we are talking about necessity we generally prefer nee d to do not need to 从这个角度讲 当我们谈论 必须 时 我们一般倾向于使用 need to do not nee d to 也就是将 need 作为实义动词用 need 作情态动词 In the other format need behaves as a modal verb like can could must s hould etc It has the same forms as modal auxiliary verbs the third person si ngular has no s questions and negatives are made without do In this format n eed is followed by an infinitive without to 另一方面 need 还可用作情态动词 就像 can could must should 等词那样 此 时它的用法同其他情态助动词一样 第三人称单数作主语时不加 s 疑问句和否定句不用 d o 来构成 做情态动词时 need 一般接不带 to 的不定式 例句 A Need I lock the door when I leave A 我走时要锁门吗 B No you needn t Sarah will be home soon B 不 不用 Sarah 马上就回来了 In this sense we are talking more about obligation and giving permission t o someone not to do something Note also that as a modal verb it is most common ly used in negative sentences and sometimes in questions 用作情态动词时 我们所谈论的更多是指义务责任以及同意某人不做某件事情 同时 要注意 作情态动词时 need 通常用于否定句 有时用于疑问句 也就是说不用于肯定句 比较 Compare the following alternatives to needn t and don t need to in the exam ples below 试比较下面对于例句中 needn t 和 don t need to 的替换用法 1 You needn t come if you don t want to 如果你不想来就不必来 Alternative Don t feel obliged to come if you don t want to 换言之 如果你不想来 不用觉得你有义务要来 2 You don t need to be a genius to see that it is wrong 你不必是个天