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
来源：学生作业帮助网 编辑：六六作业网 时间：2024/12/23 02:31:19
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 vegetbables.(改为否定句
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
1.to do.
2.You need not to eat more vegetables.
(你蔬菜英语打错了)
当need是行为动词是否定形式是 don't/doesn't need
当need 是情态动词时否定形式是needn't
例1. to do
例2. You don't need to eat more vegetables.
主语是人时用need to do
主语是物时用need doing ( = need to be done)
need有两种词性 动词和情态动词
当句子是陈述句（主谓宾 主系表）时或 肯定句时 是动词
前面如果要够成否定必须有助动词 此时 need要接to do
反之 句子是否定或疑问句时 need做情态动词用接do
1.to do 2.You needn't eat more vegetables或You need to eat less vegeta...
全部展开
need有两种词性 动词和情态动词
当句子是陈述句（主谓宾 主系表）时或 肯定句时 是动词
前面如果要够成否定必须有助动词 此时 need要接to do
反之 句子是否定或疑问句时 need做情态动词用接do
1.to do 2.You needn't eat more vegetables或You need to eat less vegetables
望采纳
收起