“Dare”是一个既可作情态动词也可作实义动词的动词，常用于疑问句和否定句中。以下是其常见用法与句型总结：
| 用法类型 | 结构 | 例句 |
| 情态动词 | dare + 动词原形 | Do you dare to speak out? |
| 否定结构 | don t/doesn t/didn t dare + 动词原形 | She didn t dare to go alone. |
| 实义动词 | dare + to do / dare doing | He dared to challenge the teacher. |
| 疑问句 | Dare + 主语 + 动词原形？ | Dare you try again? |
注意：作为情态动词时，不加“to”，且无第三人称单数变化。作为实义动词时，可用“to do”或“doing”结构。
