1 应该是否定前移,正确的是：
I don't think he works hard.
2 need 作情态动词后接动词原形,一般用于否定句和疑问句； 作实义动词时,主语是人是need to do sth
主语是物时 need doing / to be done
如
You need to wear cool clothes.
Your shoes are dirty ,they need washing .
You shoes are dirty ,they need to be washed .我记得有一道题是这样的。 Need i-------这是实义动词还是情态动词？我该怎么回答？实义动词的意思是需要 ，那么情态动词呢？怎么区分Need I... 中的need 是情态动词


请认真看我前面的例子。那么need有三单和过去时形式吗作为实义动词时有，如He nees to wear a pair of new shoes.

作为情态动词时不受人称和数的影响