如题所述
need 可做实义动词，又可做情态动词用。作为情态动词，只能用于疑问句，否定句和条件句。 need 作实义动词时后面的不定式必须带to ，need to是需要做某事的意思。 当need只用原形need后加do，否定形式为need not。
拓展资料
need
1、需要；必需
to require sth/sb because they are essential or very important, not just because you would like to have them
Do you need any help?
你需要帮忙吗？
It's here if you need it.
你要的话就拿去吧。
Don't go─I might need you.
别走——我可能要你帮忙。
They badly needed a change.
他们迫切需要一次变革。
Food aid is urgently needed.
迫切需要食物援助。
What do you need your own computer for? You can use ours.
你干吗还要自己买电脑？你可以用我们的。
I don't need your comments, thank you.
谢谢，我不需要你来评头论足。
[V to inf] I need to get some sleep.
我需要睡会儿觉。
He needs to win this game to stay in the match.
他得赢下这场比赛以免被淘汰出局。
You don't need to leave yet, do you?
你不必现在就走吧？
[V -ing , V to inf] This shirt needs washing.
这件衬衣该洗了。
This shirt needs to be washed.
这件衬衣该洗了。
note at reason
2、（表示应该或不得不做）有必要
used to show what you should or have to do
All you need to do is complete this form.
你要做的就是填好这个表格。
I didn't need to go to the bank after all─Mary lent me the money.
我最终还是不必去银行了——玛丽借我钱了。
need to
1、All right, no need to say any more.
好了，不要再说了。
2、I'll need to talk with you, but there's no hurry
我得和你谈谈，但不着急。
3、I think we need to go away and think about this.
我认为我们有必要走开一下去考虑这件事。
4、You should write-protect all disks that you do not usually need to write to.
你应该对你通常不需要写入内容的磁盘进行写保护。
5、Adults need to live their own lives and that's difficult with children.
大人需要过他们自己的生活，但有了孩子就很难做到了。
