need语法Sally __it if she doesn't want to.AA.need not do B.needs not to do C.nees not does D.needs not do为什么不选B B是实义动词You __ to the meeting this afternoon if you have something important to do.DA.need't to come B.don't need come

need语法Sally __it if she doesn't want to.AA.need not do B.needs not to do C.nees not does D.needs not do为什么不选B B是实义动词You __ to the meeting this afternoon if you have something important to do.DA.need't to come B.don't need come
need语法
Sally __it if she doesn't want to.A
A.need not do B.needs not to do C.nees not does D.needs not do
为什么不选B B是实义动词
You __ to the meeting this afternoon if you have something important to do.D
A.need't to come B.don't need come C.don't need coming D.needn't com A为什么不可以、
如何判断need是实义动词还是情态动词

need语法Sally __it if she doesn't want to.AA.need not do B.needs not to do C.nees not does D.needs not do为什么不选B B是实义动词You __ to the meeting this afternoon if you have something important to do.DA.need't to come B.don't need come
第一道题：
如果你把need看成实意动词的话,那它的否定得用助动词：doesn't need
第二道题：
如果你想选A的话就是想把它看成情态动词,但是,情态动词后面要加动词原型啊.怎么能加不定式to咧?
至于区分就是根据形式区分的,如果是情态动词,那么题里的表现通常就是直接在need后面加否定,如果是实意动词,那么题里会有单三,不定式to等明显形式,不用担心,只要你细心就会察觉到的.
be in need of...需要 ...
have (no) need to do 必须（不必）做
needn't have done 本不应该...（表本不需要做但实际上已经做了）
sth need doing = sth need to be done 某事需要被做
后面的都是跟别人那摘的,我头脑中need常考的语法现象就是 need+doing表示被动,总在选择出,十分热门啊!
关于need的用法：
“need”既可以作情态动词,也可以作实义动词,但是它们的用法不同.
作为情态动词的“need”的用法与其他情态动词“can”,“may”,“must”的用法基本相同：在限定动词词组中总是位居第一,没有非限定形式,即没有不定式、-ing分词或-ed分词等形式；第三人称单数现在时没有词形变化；情态动词之间是相互排斥的,即在一个限定动词词组中只能有一个情态动词.下面是“need”作为情态动词的用法：
一、need表示“需要”或“必须”,通常用于否定句和疑问句.例如：
1．You needn't do it again．你不需要再做了.
2．He needn't worry about it．这件事他无需担心.
3．Need he do this homework first?他需要先做这些作业吗?
4．Need they fill in the form?他们需要填表吗?
二、在否定句中,可以用need的否定形式＋不定式完成体.例如：
1．We needn't have worried．其实我们不必要慌.
2．You needn't have mentioned it．你本来不必提起这件事.
3．You needn't have said that when he asked．当他问的时候,你其实不必要说.
三、needn't后的不定式间或也能用进行式或被动语态.例如：
1．He needn't be standing in the rain．他不必要站在雨中.
2．We needn't be waiting in this place．我们不必要在这儿等.
3．The hedges needn't be trimmed thisweek．本周树蓠不必要整修.
“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
另外,“need”后还可以直接跟名词.请看下面的例子：
1．We need to collect the parcel before we leave for England．去英国之前,我们需要收拾好行李.
2．We need to tell him the truth．我们需要告诉他真相.
3．My car needs repairing．我的汽车需要修理.
4．The flowers need watering．这些花需要浇水.
5．His leather shoes needs to be mended．他的皮鞋需要修补.
6．Her room needs cleaning．她的房间需要打扫.
7．It is aquestion that needs very careful consideraton．这是一个需要慎重考虑的问题.
need用作情态动词时表“必须必要”的意思,后直接跟动词原型,且need无人称、数的变化（第三人称单数不加s）,也没有非谓语形式（不定式、分词）.
注意:
need用作情态动词时常用于否定句和疑问句中.
例：Need he bring his laptop tomorrow?明天他必须带他的笔记本过来吗?
Come on,you needn't worry about it becuse it's not your fault.行啦,你不必担心的因为那不是你的错.
She needn't have arrived so early,need she?她本不必到得这么早,不是吗?
注意:
must引导的一般疑问句的否定回答必须使用needn't.例如：
-Must I leave?我必须离开吗?
-No,you needn't.不,你不必离开.
二、need作实意动词的用法：
1、need + something 需要某物
例：I need some fruits to eat.我需要些水果来吃.
2、need to do something 需要做某事
例：You don't need to have the bike repaired right away.你不必马上去修车.
3、need doing = need to be done 需要……
例：The room needs cleaning = The room needs to be cleaned.房间需要打扫了.
4、need somebody to do something 需要某人做某事
例：I need someone to help me out of this problem.我需要找人来帮助我解决这个问题.
三、need作名词的用法：
need用作名词时,既可以是可数名词,也可以是不可数名词.主要常用句型如下：
1、(There's) no need to do something 没必要做某事
例：There's no need to cover such a long distance.没必要走那么远的距离.
There's no need for me to break the window because I have the key.我没必要打破窗户因为我有钥匙.
No need to run since we're not pressed for time.不必跑啦,我们 又不赶时间.
也可以单独使用：There's no need.意思是“没有必要”.
2、in (great) need of （非常）需要
例：The rescue team is in great need of medicine.救援小组非常需要药品.
3、if need be 如果需要的话
例：If need be,I'm going to do you a favor.如果需要的话我会帮你的.
四、关于need的一些短语、俚语用法.
1、A friend in need is a friend indeed.患难之交才是真朋友.