doctors often need (to) ask their patients health in the past.

问题描述:

doctors often need (to) ask their patients health in the past.
那个to要不要?怎么看?在这里怎么看need是不是情态动词?

need可以作情态动词也可以不做,
这里就是这种情况,两种都成立
但是口语上一般还是加to,当实义动词使用
否定时多用do not need 而少用need not