【虚拟语气10大必背句型if】虚拟语气在英语中常用于表达与事实相反、愿望或建议等。以下是10个必背的“if”引导的虚拟语气句型，帮助考生快速掌握核心用法。
| 句型结构 | 用法说明 | 例句 |
| If + 主语 + did | 表示对现在事实的相反假设 | If I were you, I would accept the offer. |
| If + 主语 + had done | 表示对过去事实的相反假设 | If I had known, I would have helped. |
| If + 主语 + were to do | 表示对将来可能发生的假设 | If it were to rain, we would stay home. |
| If + 主语 + should do | 表示对未来的可能性假设 | If he should fail, we would be disappointed. |
| If + 主语 + did not do | 否定形式，表示未实现的假设 | If I didn’t work hard, I wouldn’t pass. |
| If + 主语 + had not done | 否定形式，表示过去未实现的假设 | If I hadn’t studied, I wouldn’t have passed. |
| If it were not for… | 表示对现状的假设 | If it were not for your help, I would fail. |
| If only + 主语 + did | 表达强烈愿望 | If only I were rich! |
| If only + 主语 + had done | 表达对过去的遗憾 | If only I had studied harder! |
| It’s high time that… | 表示“早就该做某事” | It’s high time we left. |
掌握这些句型，有助于提高语法准确性和写作表达能力。
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