| 实义动词 需要助动词do | 情态动词 使用need去处理否定、疑问 | ||||
|---|---|---|---|---|---|
| 真实表达 | 虚拟表达(过去已发生无力回天) | ||||
| need sth. | You need some time. | need do | Need I go to the meeting? | need have done | 需要过去应该做某事(但事实上没有做) |
| need sb. | The baby needs mom. | needn't do | No, you needn't (go to the meeting). | needn't have done | 需要过去不做(但事实上已做了) |
| need to do | He needs to have a rest. |
需要做就去做，真实可以办到的。 不需要做就不做，也可以做到。 |
过去应该做结果没有做，现在做来不及了。 过去不应该做，结果做了，现在后悔也不行了。 |
||
| need sb. to do | I don't need friends to help me. | ||||
| need doing | Her bag needs mending. | ||||
mustn't 与 needn't
Must I finish my homework today?
| mustn't 禁止(语气强) | needn't 、don't need to 不需要(语气温和) |
|---|---|
| Yes, you must. | No, you needn't.不需要完成作业 |
| No, you mustn't.禁止完成作业 | No, you don't.不需要完成作 |
| 原型 (Base Form) | 过去式 (Past Tense) | 过去分词 (Past Participle) |
|---|---|---|
| wear | wore | worn |