一首优美的歌曲 I can be your hero 中，有几句歌词，是这么唱的：

Would you dance

If I asked you to dance?

Would you run

And never look back?

Would you cry

If you saw me crying?

And would you save my soul, tonight?

其实，细心的小伙伴就会识别出里面的语法点：虚拟语气！

知道了这首歌是用虚拟语气写的，才能真的明白其真正的含义，才能明白这是一首感动的石头都会流泪的歌曲。这首歌的作者，是写给自己逝去的亡妻。当我邀请你跳舞时，你会跟我跳舞吗？意味着亲爱的你再也无法跟我跳舞了。这首歌其实在天津港爆炸事件发生后，显得更加应景。早晨敬爱的消防员，还在跟家人一起吃早晨，转眼间，他们已经消失不再…..这时候，如果家里人想表达，多么希望再能见到你，如果想表达“如果你看到我哭泣，你会哭泣吗”，就应该用虚拟语气“Would you cry ,if you saw me crying”。

说着好伤感，还是让我们言归正传，回到到底什么是虚拟语气上吧！

一. 定义

虚拟语气（the Subjunctive Mood）表示虚假的、与事实相反的或难以实现的情况。，而是一种愿望、建议或与事实相反的假设等。

二、 SAT之中的运用

SAT考查虚拟语气基本上分为以下几个重点内容：

1、 if引导的虚拟条件句

（1）主句和从句都与现在事实相反时，结构为：

If+did/were…, 主语+would/should/could/might+V

If I were you, I should not go with him.

（2）当主句和从句都与将来事实相反，或指不大可能发生的事的时候，结构为：

If+did/were to/ should…, 主语+would/should/could/might +V

IfIhadtriedhardlastterm,Iwouldhavesucceeded.

（3）主句和从句都与过去事实相反时，结构为：

If+had done…., 主语+would/should/could/might +have done

If it rained/were to rain/should rain tomorrow, the match would be put off.

2、 if引导的虚拟条件句的省略倒装情况：

if从句中有were/had/should时，可以省略if，并将were/had/should提到句首。

If I were a boy ,I would join the army. 可以省略倒装为：

Were I a boy, I would join the army.

If we had known you were in hospital,we would have visited you.可以省略倒装成：

Had we known you were in hospital,we would have visited you.

If there should be an earthquake, this bookshelf would fall forward.可以省略倒装成：

Should there be an earthquake, this bookshelf would fall forward.

那么在考试题目中，此类的题目是怎么应用的呢？

例题1：

Professor Brown started (A) yesterday's lecture by suggesting (B) that if (C) Benjamin Franklin were alive today, he probably worked (D) for an advertising agency. No error (E)

这个题目，应该选D。If从句中，有were，根据我们前面所讲，这里应该是一个would do的形式，所以应该改为would work.

例题2：

He was convinced that if property taxes would have rose any higher, he would have had to move to a different area.

(A).if property taxes would have rose

(B).if property taxes would rise

(C).if property taxes had risen

(D).had property taxes rose

(E).were property taxes to rise

这个题目的正确答案是C选项。通过未划线部分的would have had 可以推断出，从句应该是虚拟语气，并且是与过去的虚拟，所以C为正确选项。

例题3：

If there had been a power failure, the hospital will run on electricity from its own generators, which can operate for 200 hours.

(A).If there had been

(B).If there were

(C).Had there been

(D).Should there be

(E).There has been

这个题目应该选D。根据句意可知，这是对将来的虚拟，D选项还原之后是If there should be a power failure，正好是符合我们上文讲的对将来的虚拟的结构“If+did/were to/ should…, 主语+would/should/could/might +V”.

By painting them this afternoon, the walls would be completely dry by tomorrow evening.

(A).By painting them

(B).If they would have been painted

(C).Were they to be painted

(D).After painting them

(E).They would be painted

这个题目应该选C选项。通过题目“would be completely dry”和“tomorrow evening”，我们可知道这是对将来的虚拟，所以从句应该为“If+did/were to/ should…”，因此应该选C，因为C是省略了If再把were提前。

好了，小伙伴们，你学会怎么用虚拟语气了吗？

杭州培顿教育致力于为高中生提供高品质的 SAT 课程。我们的教师均具有丰富的教学经验和专业的知识背景，能够为孩子提供精准的指导。课程设置科学合理，注重培养孩子的综合能力。加入培顿 SAT 课程，让孩子在激烈的竞争中脱颖而出，顺利进入世界名校。