提一个英语语法点~need与must有关Our school must_____everyday.a、keep cleanb、be keep clean.疑问:keep在这里是不是连系动词?如果是连系动词不是就要主动表不动,还是和must有关?请解释一下这题的语法点.

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提一个英语语法点~need与must有关Ourschoolmust_____everyday.a、keepcleanb、bekeepclean.疑问:keep在这里是不是连系动词?如果是连系动词不是就

提一个英语语法点~need与must有关Our school must_____everyday.a、keep cleanb、be keep clean.疑问:keep在这里是不是连系动词?如果是连系动词不是就要主动表不动,还是和must有关?请解释一下这题的语法点.
提一个英语语法点~need与must有关
Our school must_____everyday.
a、keep clean
b、be keep clean
.
疑问:keep在这里是不是连系动词?如果是连系动词不是就要主动表不动,还是和must有关?
请解释一下这题的语法点.
顺便向我介绍一下must,need和连系动词的具体用法

提一个英语语法点~need与must有关Our school must_____everyday.a、keep cleanb、be keep clean.疑问:keep在这里是不是连系动词?如果是连系动词不是就要主动表不动,还是和must有关?请解释一下这题的语法点.
这里应该是被动语态吧,跟主动表被动没关系:
情态动词+be+及物动词的过去分词
Young trees must be watered often.
Your mistakes should be corrected right now.
The door may be locked inside.
Your homework can be handed in tomorrow.
所以应该选择B,不过你好像打错了,keep的过去分词应该是kept
主动表被动总结一下有如下情况:
① 有些动词在主动结构中,后面接不带to的不定式,但如果改为被动,则需把省略的to加上,这类动词有hear,watch,make,help,let等,如:The boss made my grandfather work 10hours a day.改成My grandfather was made to work for 10 hours a day.
② 含有宾语从句的主动结构变为被动,通常用it作为被动结构的先行主语,从句放在句子后面/也可采用另一种形式,这类动词有:know,say,believe,find,think,report等
③ 是所有的主动句都可以变换成被动句,更不是所有的被动句都可以自由变换成主动句.虽然语法原则上允许主动和被动句的互相转换,但有的句子转换后会变成不通顺或不地道的英语句子.因此,在某些题目里,这也成为判断应该用主动还是用被动的依据.
例:At 5:05 p.m.on Saturday 19th July ,there was an accident at the junction of the Main Street and Panda Road when a boy was knocked down off his bicycle by a delivery van.The boy was sent to St.Maria Hospital where he was treated for shock and a broken arm.
在这段文章里,a boy was knocked down off his bicycle by a delivery van这句被动句强调出读到文章的人最关心的事故的受害者.The boy was sent to St.Maria Hospital这句话则说明了孩子被送到医院的事实,至于是由谁(某个过路人?或肇事司机?)送的不重要.he was treated for shock and a broken arm这句被动句无须说出treat这个动作的发出者,因为在医院,伤病员自然由医务人员处理,无须罗嗦.这样,这段文章就重点突出,条理清楚了.
④ 有些动词可以有两个宾语,在用于被动结构时,可以把主动结构中的一个宾语变为主语,另一个宾语仍然保留在谓语后面.多是把间接宾语变为主语.这样句子自然些.直接宾语变为主语时,间接宾语要变为某个介词的宾语,介词to可以省略.如His father left him this house.改为This house was left (to) him by his father.
⑤ 有些动词虽为及物,但宾语并非是动作承受者,不能转换,这些动词有have,hold(容纳),suit,fit,lack,become(适合)contain,cost,last,mean,suffice(足够)等.
⑥ 当直接宾语为反身代词、相互代词或宾语前有指代主语的物主代词时不用被动,如I shook my head.我摇摇头.
⑦ 当宾语为同源宾语(与主句指同一人),动名词,动词不定式或一个从句时不用被动.如John enjoyed seeing the fil,.
⑧ 在一些固定说法中,有些名词和动词结合的固定说法,不能改We Chinese always keep our word.
⑨ 某些从不及物动词转化来的及物动词,直接宾语在表示动作的方式或效果时,这些动词在意思上起状语的作用,没有被动The girl kissed her boyfriend good night=The girl said good night to her boyfriend by kissing him.(这个女孩说了晚安并且亲了他的男朋友)
⑩ 表地点\处所\组织\长度\大小\数量\程度\抽象名词的词做宾语时不用被动.
⑪ 某些“不及物动词+介词”短语,walk into,listen to,sleep in,agree with,shake hands with,belong to,take part in,keep up with不能用被动.
⑫ 某些词用主动表被动:sell,miss,build,grow,look,smell,taste,sound,feel等

首先,大声疾呼20遍:
Our school must keep clean veryday。
读完了么?是不是很顺?习惯就好了.
现在告诉你keep在这里相当于连系动词,这是keep的一种用法,足够了!
must:Must I do my homework now?我必须...?
need:Need I do my homework now?我需要...?...

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首先,大声疾呼20遍:
Our school must keep clean veryday。
读完了么?是不是很顺?习惯就好了.
现在告诉你keep在这里相当于连系动词,这是keep的一种用法,足够了!
must:Must I do my homework now?我必须...?
need:Need I do my homework now?我需要...?
再体会这两句:
you mustn't go!你坚决不能走!
you needn't go!你没必要走!
连系动词:说白了它只不过像鞋带一样,没了它你的需要系带的鞋子就没法用了.你就表达不请了.结构:主语+系动+形容词
you are cool!

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两个没有对的,第二个没写错吧?应该是:be kept clean
不是连系动词."KEEP STH +形容词",形容是宾补.
must和need都是情态动词,后接动词原形.must 用于肯定句和疑问句,must和 need开头的问句,肯定回答用must,否定用needn't(不必).
而mustn't表示"不许""千万别".
need做情态动词时主要用于疑问...

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两个没有对的,第二个没写错吧?应该是:be kept clean
不是连系动词."KEEP STH +形容词",形容是宾补.
must和need都是情态动词,后接动词原形.must 用于肯定句和疑问句,must和 need开头的问句,肯定回答用must,否定用needn't(不必).
而mustn't表示"不许""千万别".
need做情态动词时主要用于疑问句,否定句。
need也可 做行为动词,意思是"需要",后面可以接名词和动词不定式,表示有这个需要和必要去做某事。
系动词:be(表示状态); become,get ,turn(表示变化);appear,seem,look,sound,taste,smell(表示感观)
系动词后面都可以接名词或形容词做表语,除be动词疑问句和否定句要提前或直接在其后加否定词NOT外,其它的系动词变化和普通动词一样.
你再参照这个:http://zhidao.baidu.com/question/49799885.html?si=1

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