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
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
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
sunfei0820 幼苗
共回答了66个问题 举报
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)
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)
1年前
2
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你能帮帮他们吗