need to do sth的否定形式是什么?

need to do sth的否定形式是什么? need的否定形式可以是need need to do sth为啥在否定形式时不可以呢?need doing sth在否定形式时怎样才能判断need to do sth与need doing sth?例题：1.He does not need________(do) too much homework.2.You need to eat more veg need的否定形式可以是need need to do sth为啥在否定形式时不可以呢?need doing sth在否定形式时怎样才能判断need to do sth与need doing sth?例题：1.He does not need________(do) too much homework.2.You need to eat more veg need to do sth 的两种否定形式有什么区别?怎样区分和应用? need to do的否定形式 to not do sth & not to do sth不定式的否定形式是 not to do sth.那么,to not do sth 有这样的说法吧.那 learn not to do sth 也是病语么?辛苦大家了..... 什么是实意动词need 有两种形式1.need to do sth.否定：don't need to do sth.2.need do sth.否定：needn't do sth.这是否与实意动词和情态动词有关呢?请展开来说（详细一点）如果好的, want sb to do sth.的否定形式到底是什么？ sb used to do sth.它的否定形式是什么? dare to do sth的否定形式是什么 enough to do sth的否定形式是什么? allow sb to do sth 的否定形式 1.want sb to do sth 否定形式?2.help sb do sth 的否定形式又 是什么?3.好像动词不定式否定 是 在不定式之前加not,构成not to do sth.如：tell sb not to do sth但 want to do sth 就是直接用 don't want to do sth 怎么回 need to do sth 和need do sth的区别 make sb do sth 否定形式是? need to do的否定为什么不可以是 need not to do否定在不定式? need to do sth 和 need doing sth的区别? 为什么ask sb to do sth的否定形式是ask sb not to do sth但 I want to be an actor.的否定形式是I don't want to be an actor不都是动词不定式吗?