
need用法及练习.doc
4页精选优质文档-----倾情为你奉上need用法解析一.用作实义动词作为实义动词,need后面的宾语可以是名词、动名词、动词不定式或代词,这种情况下,need既可用于肯定句,也可用于否定句和疑问句,构成否定句和疑问句时要借助于助动词do或does.1.need sth.这是need最常见的用法之一,其后的宾语可以是名词,也可以是代词如:1). We need a great deal of money now. 我们需要和多钱2). They don’t it any more. 他们不再需要它了3). Does your father need any help? 你爸爸需要帮助吗?2.need doing 与 need to be doneneed后面可跟动名词作宾语,这种情况下应注意两点:①.主动形式的动名词doing具有被动的含义;②.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:4). The door needs painting. = The door needs to be painted. 那扇门需要油漆一下5). Your car needs mending. = Your car needs to be repaired. 你的车需要维修了。
3.need to do sth.作为实义动词,need后面需要接带to的动词不定式,表示有义务或责任去做某事如:6). What do we need to take for the picnic? 野餐我们需要带些什么?7). Will we need to show our passports? 我们需要出示护照吗?8). You need to take good care of your mother. 你要好好照料你妈妈二.用作情态动词作为情态动词的need具有情态动词的一般性质,要充分阐释作为情态动词的need的用法,务必首先说明白情态动词的特征情态动词的主要特征:①.没有人称和数的变化不论主语是第几人称,不论主语是单数还是复数,情态都词都无形式变化;②.不能单独充当谓语情态动词必须与一个实义动词一起构成复合谓语,并且这个实意动词要始终是动词原形③.变为否定句时只需在情态动词之后加not④.变为疑问句时只需将情态动词提到主语的前面这是情态动词的共性,作为情态动词的need当然也具有这些共性了解了这些还不够,还要掌握作为情态动词need的一个个性,就是它只能用于否定句和疑问句,或用于由if或whether引导的宾语从句中,一般不能用于肯定句。
理解了这些之后,我们便可以如此区分need的词性了:只要need后面跟的是动词原形,它就是情态动词这时,变否定,只需在其后加not;变为疑问句,只需把它移主语的前面例如:9). Need I type this letter again? 我需要重新录入将这封信吗?10). There is enough time. You needn’t hurry. 有的是时间,你不必着急11). The president wondered whether he need send more soldiers. 总统不知道他是否要增兵12). ---Must I hand in my homework now? 现在我必须交作业吗?---No, you needn’t. 不,你不必三.用作名词need作为名词,含义为“缺乏,需要”;其复数表示“基本需要”要掌握两个词组:in (great) need of(急需) 与meet the needs of(满足……的需要)例如:13). There’s no need for you to try again. 你不必再尝试了14). The factory is in great need of funds. 那家工厂急需资金。
15). This house of the 1790’s can even meet the needs of the 21st century. 这栋18世纪90年代的房子甚至能够满足21世纪的需要四.自我检测现在可能你很想知道你是否完全掌握了need的用法,请做下列练习,进行一次自我检测,将正确答案填写在题前的括号中 ) 1. You any help, do you? A. don’t need B. needn’t C. need D. doesn’t need( ) 2. ---Must I stay at the office this afternoon? ---No, you . A. don’t B. needn’t C. don’t need D. can’t( ) 3. Tom get up a little earlier tomorrow. A. needs B. need C. need to D. needs to( ) 4. Need the doctor ________ with you tonight? A. staying B. stay C. stays D. to stay ( ) 5. Look! Your shirt is so dirty. It . A. need washing B. need to wash C. needs washing D. need wash( ) 6. The supply can’t the demand. A. meet need of B. meet the need of C. meet the needs of D. meet needs of( ).7. The hospital is blood. A. in great need of B. on great need of C. in great need with D. on great need with( ) 8. Your room is full of dust. It . A. need clean B. need cleaning C. need to be cleaned D. needs to be cleaned( ) 9. David anything to drink? A. Need,…\ B. Needs,…\ C. Does…need D. Do…need( ) 10. You to the meeting tomorrow if you have something important to do. A. needn’t to come B. don’t need come C. don’t need coming D. needn’t comeKEY: 1-5. ABDBC 6-10. CADCD“我”叫need,大多数人都以为我是情态动词家族中的成员,其实呀,我也有动词和名词的词性,这你们不知道吧?快一起到我那两个“亲戚”家坐一坐吧! 1. 表示“需要”,作情态动词用,没有人称和数的变化,后接省略to不定式,多用于疑问句和否定句,疑问句答语表肯定用must,have to;表否定用needn‘t,don‘t have to。
如: —Need I come tomorrow? 明天我需要来吗? —Yes, you must / have to. 是的,你必须来 (—No, you needn‘t / don‘t have to. 不,你没有必要来) He needn‘t worry about his son. 他不必为他的儿子担心 2. 表示“需要”,作实义动词用时,有人称和数的变化,后接名词、代词、带to不定式、动名词等如: He needs some help. 他需要一些帮助 He needs to look after the old man. 他需要照料这位老人 The bike needs mending / to be mended? 这辆自行车需要修一下 (注:主语需要发出某一动作用不定式主动语态;主语需要接受某一动作用动名词或不定式被动语态现只要知道有这么一种语态叫做被动语态就可以了,以后我们会学习到) 3. 表示“需要”,用作名词时,可作可数名词或不可数名词如: We should try our best to meet the workers‘ needs. 我们应该尽力满足工人们的需要。
I‘m badly in need of your help. 我非常需要你的帮助 There‘s a great need for teachers here. 这儿非常需要教师There‘s no need for doctors here. 这儿不需要医生2.need作实放动词,主要有下列两种用法: 1)sth.+need+doing sth.=sth.+need+to be done如: The flowers need watering.(The flowers need to be watered.) 2)sb.+need+to do sth.如: Does he need to know他需要知道吗? You don't need to worry about him.你不必为他担心 “need”作为实义动词时,通常用法是: 人+need +to do 物+need +doing 物+need +to be done情态动词can用法Hi, everyone! I'm "can". 我是情态动词,没有人称和数的变化,后面跟动词原形例如: I can play badminton. 我会打羽毛球。
Mary can play the drums. 玛丽会敲鼓 那你知道我还经常变脸吗?不信?你瞧: 1. 受到质疑:把can提到主语之前,句末加上问号例如: Can he play the piano? 他会弹钢琴吗? 2. 遭到否定:can后加not,缩写成can't例如: He can't play the piano. 他不会弹钢琴 3. 以我开头的一般疑问句的肯定回答为:Yes,主语+can.;否定回答:No,主语+can。
