情态动词
约 348 字大约 1 分钟
2026-07-14
许可
| 情态动词 | 含义 | 例句 |
|---|---|---|
| can | 可以（常用） | Can I go out? |
| could | 可以（更礼貌） | Could I use your pen? |
| may | 可以（正式） | May I come in? |
| mustn't | 不可以（禁止） | You mustn't smoke here. |
| don't have to | 不必 | You don't have to come early. |
mustn't 表示"禁止"，don't have to 表示"不必"，两者不同。
推测
| 情态动词 | 把握 | 例句 |
|---|---|---|
| must | 一定（非常肯定） | He must be at home. |
| can't | 不可能（非常否定） | He can't be there. |
| may / might | 可能（不确定） | He may be right. |
| could | 可能（较不确定） | It could rain later. |
推测的时态
| 时间 | 结构 | 例句 |
|---|---|---|
| 现在 | 情态动词 + do / be | He must be tired. |
| 正在 | 情态动词 + be doing | She must be sleeping now. |
| 过去 | 情态动词 + have done | He must have left. |
义务 / 必要
| 情态动词 | 含义 | 例句 |
|---|---|---|
| must | 必须 | You must finish your homework. |
| have to | 不得不（客观） | I have to go now. |
| should | 应该 | You should study harder. |
| ought to | 应该 | You ought to help him. |
| need | 需要 | You need to rest. |
能力
| 情态动词 | 含义 | 例句 |
|---|---|---|
| can | 能 | I can swim. |
| could | 过去能 | I could swim when I was 5. |
| be able to | 能够（各种时态） | I will be able to come. |
意愿
| 情态动词 | 含义 | 例句 |
|---|---|---|
| will | 愿意；会 | I will help you. |
| would | 愿意（礼貌） | Would you like some tea? |
| shall | ……好吗（建议） | Shall we go? |