need do与need to do区别 needn't do与don't need to do区别

做实意动词的时候用to do 的形式
其实need可以做情态动词和实意动词,当need做情态动词的时候,没有单三和过去时的变化,但是做实义动词的时候就有单三和过去时的变化因此就这两点可以判断出来
如：
He need drink a bottle of water
He needs to drink a bottle of water 前者是情态动词而后者则是实义动词是不一样的!
主要的判断方法就是我说的
如果还有不懂得问题可以来问我

(1) "need" 当 (main verb) 用时应该加 "to" :
(a) I think he doesn't need to worry about his health.
(b) He needs money to buy a car.
(c) He needs to work as he has a big family.
(d) He needs to go.
(e) Does he need to go so soon?
(f) He doesn't need to go.
(2) 当 (auxiliary verb) 用时不能加 "to":经常只使用 (present tense).
(a) I think he needs worry about his health.
(b) I think he needs not worry about his health.
(c) He needn't go.
(d) Need he go so soon?
(3) 助动词 auxiliary verbs = need,can,may...

need to do sth实义动词
need do sth.没有这种用法,
有need doing,表被动
“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

1. need to 作情态动词,有need do ,相当于need to do,通常用于疑问句、否定句、条件句、 whether(if) 名词从句或含否定意义的句子中. 如： I do not see why we need discuss it further. 我看我们没有必要讨论...

可以的 只不过第一个是助动词 第二个是实义动词

need 作情态动词时一般用于否定句和疑问句中.
肯定句一般用作实意动词.
例如：
We need to wear warm clothes in winter.（实意动词）
You needn't finish your homework now.(情态动词)
Need he run so fast?No,he needn't .(情态动词)

neednˊt do是情态动词的否定式加动词原形.does＇t need to do是实义动词的否定式
need do是情态动词 ,need to do是实义动词

1、need to do sth 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.2、need 作情态动词,后面直接接动词原形 need do sth“需要做某事” I need do my homework right now.我要马上做作业了.3、need doing = need to be done 需要……被做,这两短语没有什么区别 例：The room needs cleaning = The room needs to be cleaned.房间需要打扫了.

need”既可以作情态动词,也可以作实义动词,还可以作名词,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 的具体用法作情态动词
　　一、need表示“需要”或“必须”,通常用于否定句,疑问句,条件句.例如：
　　1．You needn't do it again．你不需要重复做了.
　　2．He needn't worry about it．这件事他无需担心.
　　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．其实我们不必担心.
　　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 this week．本周树蓠不必要整修.
　　四、其一般疑问句的答语,肯定用must,否定用needn't.
　　Yes,you must.是的,你需要去.
　　No,you needn't.不,你不必去.作实义动词
　　主+need +to do
　　主+need +doing =sth+need +to be done
　　（都是实义动词,注意其否定为主+don‘t/doesn't+need +to be done或主+needn’t +be done　　例如：
　　The room needs cleaning = The room needs to be cleaned.房间需要打扫了.
　　另外,“need”作实义动词时后还可以直接跟名词.请看下面的例子：
　　It is a question that needs very careful consideration．这是一个需要慎重考虑的问题
　　很简单的方法区别情态动词与实义动词：当need为情态动词时,意思是“必要”,否定为"needn't",后面大多接动词原形,表示动作；

need可以做情态动词也可以做行为动词,做情态动词的时候是need do,而做行为动词的时候就要用need to do 了
在肯定句中,need基本都是做行为动词的,所以这题选A

need有2种词性
1,情态动词 就是你说的need do
2,实意动词 就是need to do
这两个都可以用,都是正确的,所以在肯定句中看不出区别
一般做题是从否定句中看出来的
1,needn't do
2,doesn't/don't need to do
这两种都是正确的
以下是一些干扰选项,都是错误的
needn't to do
doesn't/don't need do
因为它们混淆了情态动词与实意动词
needn't 是把need 看作情态动词,后面就不能再用to了
而dosen't/don't则把need看作实意动词,而后面加do,又相互矛盾.

不常用need do作为情态动词的时候可以用need+动词原形
I need repair the bike
只有need to do和need doing
一般是人+need to do如：I need to repair the bike（主动语态）
和物+need doing如：the bike need repairing（被动语态）
当然并没有指定主语一定是人或物我给出的只是习惯用法

need do ----需要做某事 need 在这里是情态动词
need to do ---需要做某事 表示主动
need doing ---需要被做某事 表示被动
1 What need do you have I to serve for you?
你有什么需要我为你服务的吗?
2They need to do the same now.
他们现在又需要这么干了.
It has many works to need doing.
有很多事情需要去做.
不懂的问我哦

need to do里面,need是行为动词,如果是否定句,要说don't/doesn't need to do.疑问句要说do/does sb.need to do.
need do里面,need是情态动词,如果是否定句,要说needn't do.如果是疑问句,要说need sb.do.