请说出下列句子中need用作情态动词还是行为动词
问题描述:
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.( )
答
1和3是情态动词