does he need to know?这里的need为什么不能当情态动词用?构成情态动词的条件是什么?

-----he ---it?a does;need know b does;need to know c needs ;know d need; to know does he need to know?把他改成need he know? does he need to know?这里的need为什么不能当情态动词用?构成情态动词的条件是什么? Which bus （ ）he （ A.need,to take B.does,need to take C.need,take ( )he( )look at a map A.Does;need B.Need;to C.Does;need to D.Needs;to 改错1.He need some help.2.Does he need come?3.He need not to come. he wants to know when Tom does his homework. Does anyone know how to install weibo into blk berry?I need Does anyone know how to install weibo into blk berry?I need it意思是? Need not to know Need not to know. need not to know Need Not To Know 翻译what does he need? He _______buy a bike A needs B does't need C needn't D need to 请说出下列句子中need用作情态动词还是行为动词1)He needs to come early.( )2)Does he need to know this now?( )3)Need I write the letter now ( )4)You don't need to tell him the news.( ) He who does a thing well does not need to boast一句谚语,要翻译 he doesn't need to go to school 这句话 反义疑问句怎么改?does he? 英语：Does he need to write down his name ? 为什么用to,求英语：Does he need to write down his name ?为什么用to,求解释