need do,need to do在陈述句中可以互换吗?

是need do 还是 need to do need sth to do need to do造句 need的用法?need to do还是need do? need do/need to do/need doing的意思 need doing need to do 区别 need to do的否定为什么不可以是 need not to do否定在不定式? 什么时候用need do 什么时候用need to do?,比如need buy 与need to buy have need to do造句 need to do sth 和need do sth的区别 need to do sth 和need do sth列句 need to do跟need do的区别? need to do 和 need do的区别 what i need to do what need i do? need do,need to do在陈述句中可以互换吗? 在做适当形式填空时,怎么知道是填need to do,还是need do? Everything we need to do ___(do) Do you need to do homework?why?