It's time we left. I'd rather you didn't smoke in here. She acts as if she owned the place. 这几句话其实都不是在说过去——三句话说的都是现在，或者不久的将来——可每一句都用了过去时的动词。这和英语在第二条件句以及 wish / if only 中用的是同一个手法：过去时形式表示这个情况是非真实的——不是实际发生的事——即便意思完全是关于现在的。

速记公式： it's (about/high) time + 一般过去时。would rather + 主语 + 一般过去时（表示希望别人做某事）或 过去完成时（为过去感到遗憾）——但如果没有新的主语，只是自己的偏好，就用 would rather + 动词原形。as if / as though + 一般过去时（现在非真实）或 过去完成时（过去非真实）。

It's (about/high) time + 一般过去时

It's time、it's about time，以及语气更强的 it's high time，都是在说某件事早就该发生了——但现在还没发生。后面接的从句用一般过去时，尽管表达的是现在或不久后的事：

  • It's time we left — the film starts in ten minutes.
  • It's about time you got a new phone; that one is falling apart.
  • It's high time the government did something about this.

对于这种“早该如此”的意思，标准形式就是一般过去时：✅ It's time we left。偶尔也能听到用现在时的说法，比如 it's time we take action，尤其是在美式英语里，但这里要学、要用的是过去时形式——正是它把这个想法标记为“已经拖延”，而不只是陈述一个事实。

It's time 后面也可以接一个普通的不定式，没有任何非真实含义——比如 It's time to go 或 It's time for us to go——但这是另一种更简单的结构（没有主语，也没有过去时形式），不带有“这事早该发生了”的那层含义。

Would rather：这是谁的偏好？

Would rather（较少见的说法是 would sooner）用来表达偏好。后面接什么形式，完全取决于想要的那个动作有没有新的主语。

没有新主语——表达自己的偏好——would rather + 动词原形（不带 to）：

  • ✅ I'd rather stay home tonight.（绝不能说 ❌ I'd rather to stay）
  • Would you rather walk or take the bus?

如果后面接一个有自己主语的从句，表示现在或将来的情况——非真实的过去时就出现在这里。 在英式英语和大多数考试语境中，用 would rather + 主语 + 一般过去时；美式英语中也很常见用动词原形（有点类似虚拟语气）：

  • I'd rather you stayed home tonight.（英式/考试标准形式——我希望你留下）
  • I'd rather you didn't smoke in here.
  • I'd rather you stay home tonight.（也很常见，尤其是在美式英语中）

说过去、希望事情当初不一样的从句——would rather + 主语 + 过去完成时，和第三条件句一样，用更“后退”一层的过去形式来表示对过去事实的遗憾：

  • I'd rather you had told me sooner.（你当时没告诉我——这就是遗憾所在）
  • She'd rather he hadn't said anything at the meeting.

中文主要靠“要是……就好了”“希望当时……”和上下文表达假设或遗憾，动词本身不变形；英语却要靠动词形式区分：would rather you stayed 是现在/将来的偏好，would rather you had told 才是对过去的遗憾。

容易犯的错误是把这两种模式搞混：❌ I'd rather to stay home（没有新主语却加了 to）→ ✅ I'd rather stay home。

As if / as though：非真实的比较

As if 和 as though 在这类比较从句里意思相同（as though 语气略显正式）。它们把某个情况和一个被当作非真实的情况相比较——某件事看起来、显得或感觉如何——过去时形式让这种比较明显带有假设性，或者与事实相反。

现在非真实的情况→ as if / as though + 一般过去时（正在进行中的情况用过去进行时）：

  • She acts as if she owned the place.（她其实不是主人——她才刚搬进来）
  • He behaves as if he were running the company.（他其实不是——他只是发号施令，好像自己是老板一样）

主语为单数时，这里也常常出现和 wish 一样正式的非真实形式 were：✅ as if he were the boss，口语中也会说 as if he was the boss。

as if 后面接现在时也非常常见，完全自然——只是不表明这个比较是假的：He talks as if he knows everything 只是在描述他说话的样子（他也许真的懂很多，也许不懂）。换成过去时，He talks as if he knew everything，就更明确地表示说话人怀疑，或者认为这不是真的。两种说法都不算错——真正承担这个页面所讲“非真实”含义的，是过去时形式。

过去非真实的情况→ as if / as though + 过去完成时，表示当时看起来是那样，其实并不是真的：

  • He spoke as if he had written the report himself — but he hadn't.
  • She acted as though she had never heard the news, even though everyone had already told her twice.

要小心一个看起来很像的句子，比如 He looked as if he had seen a ghost——这里的过去完成时主要是在表示时间先后（“看见”发生在“看起来”之前：他一脸震惊的样子，就像刚看见鬼的人那样），并不一定是说他什么都没看见。到底 as if + 过去完成时是在标记一个真实发生的先后顺序，还是一个非真实的比较，要靠上下文来判断。

一个很有用的对照：如果比较的内容确实很有可能发生，或者是预期之中的，英语就直接用普通的现在时或将来时——✅ It looks as if it's going to rain 表达的是一种真实、可能性很大的情况，和上面这些非真实比较完全不同。

常见错误

  • ❌ It's time we leave. → ✅ It's time we left.（对于“早该如此”这个意思，应该用一般过去时，尽管意思是现在的）
  • ❌ I would rather to stay home. → ✅ I would rather stay home.（没有新主语时，需要不带 to 的动词原形，也不需要过去时形式）
  • ❌ I'd rather you had come tomorrow. → ✅ I'd rather you came tomorrow.（关于将来的偏好需要一般过去时，而不是过去完成时——had come 只用于对过去的遗憾）
  • ❌ She acted as though she has never heard the news. → ✅ She acted as though she had never heard the news.（关于更早时刻的比较需要过去完成时，而不是现在完成时）
  • ✅ He talks as if he knows everything 是一句自然、常见的日常表达——但如果想专门表示怀疑或非真实，那就要靠过去时形式：✅ He talks as if he knew everything。

快速检测

哪种形式最合适？

  1. It's time we ____ (leave / left / have left) — the taxi is waiting.
  2. I'd rather you ____ (don't smoke / didn't smoke / not smoke) in the house.
  3. I'd rather ____ (stay / staying / to stay) home tonight, if that's okay.
  4. She acts as if she ____ (owns / owned / had owned) the place, though she only moved in last month.
  5. He spoke as if he ____ (writes / had written / write) the report himself — but everyone knew he hadn't.
查看答案
  1. left ——表示“早该如此”这个意思的标准形式是一般过去时，尽管意思是现在的（leave 在某些方言里也说得通，但不是这里要学的形式）
  2. didn't smoke ——表达对他人行为偏好的英式/考试标准形式是一般过去时（not smoke 也常听到，尤其是在美式英语中）
  3. stay ——没有新主语，表达自己的偏好，用不带 to 的动词原形，不需要过去时
  4. owned ——一般过去时让这个比较明显是非真实的（owns 也很自然，只是对是否属实保持中立）
  5. had written ——关于更早、非真实情况的比较需要过去完成时

关键要点

  • It's (about/high) time + 一般过去时表示某事早就该发生了：It's time we left.
  • 没有新主语时，用would rather + 动词原形（不带 to）：I'd rather stay home.
  • would rather + 主语 + 一般过去时表达对别人现在/将来行为的偏好：I'd rather you stayed home. 若是对过去感到遗憾，则改用过去完成时：I'd rather you had told me sooner.
  • as if / as though + 一般过去时让比较明显是关于现在的非真实：She acts as if she owned the place. 关于过去的非真实情况，用过去完成时：He spoke as if he had written the report himself.
  • 这三种结构都用到了和第二条件句、wish 相同的核心思路：过去时形式不总是表示过去的时间——它也可以表示这个情况并不是真实的。