SAT语法考试虚拟语气用法，供大家参考。
首先，对于过去情况的虚拟：表示与过去事实相反的假设，一般表示对于过去的推测，也表示从现在的角度对已经发生的事情发出感叹、表达后悔，意为如果当初怎么样，那么现在就怎么样了。条件句中用过去完成时态，主句用“would/should/might/could+have done”：
结构：If+had done, S.+ would have done.
在英文歌曲中，多半都省略了前面的If从句，而直接用后面的主干来表示对故去发生的事情的一些感叹。我们来看看都有那些歌曲用了过去的虚拟呢～
小甜甜布兰妮的成名曲～
(1)Baby one more time---------Britney Spears
歌词：Oh baby baby，I shouldn’t have let you go.
翻译：哦，宝贝，我本不应该让你走。
解析：表示对过去的后悔。
实力唱将Adele：
(2)Rolling in the deep---Adele
歌词：We could have had it all，rolling in the deep.
翻译：我们本该拥有一切，爱恨情仇交织。
解析：对过去的感叹和后悔。
怎么样，听了这么多是不是很过瘾呢，下面我们来做一道SAT题来检验一下：
Ellen would call me if she had remembered my phone number.
A) would call me if she had remembered
B) would called me had she remembered
C) would call me if she were to remembered
D) would have called me if she would remember
E) would have called me if she had remembered
解析：句子的意思是如果Ellen记得我的电话的话，她就应该给我打电话了。但实际上，Ellen并没有记得我的电话号码，因而没有给我打电话，这是一个对于过去情况相反的假设，所以应该是主句用would have done，从句用had done的形式。所以选择E。
讲解完了对于过去的虚拟情况之后呢，我们来学习一下对于将来的虚拟。对于将来情况的虚拟，表示与将来事实相反的假设，条件句中谓语动词可以用should do 或were to do;主句谓语动词用“would/should/might/could+动词原形”：
结构：If+were to do/should+V. / did, S. + would+ V.
惠特尼休斯顿的歌曲都很经典，其中这首歌更是被人传唱：
(3)I will always love you----Whitney Houston
歌词：If I should stay, I would only be in your way.
翻译：如果我留下来，我将会成为你的羁绊。
解析：这句是整首歌的第一句，是一个典型的对将来的虚拟。表达了唱歌的人对于将来的一些愿望和想法，但是不能留下来。
上面的歌曲是从句加了should do的对于将来的虚拟，这里我们来通过
Were they to be told the purpose of the study, the participants might find it difficult to answer the questions spontaneously.
(A) Were they to be told
(B) If they would have been told
(C) With it being told them
(D) Telling them
(E) By telling them
解析：很明显，根据句意，此句应该是对将来的虚拟。后面的主句用了might+动词原形，那么从句就应该用were to do 或者should do.但是选项里只有A有to do, 可是A又是个什么结构呢?这是虚拟的倒装句式：
虚拟倒装：
在if条件句中含有should，had， were时，常常会把if省去，并将should，had，were放在句首(其余部分顺序不变)。
如：If I were you, I would go.等同于Were I you, I would go.
这样我们就能知道，其实A选项的Were they to be told=If they were to be told.
以上就是为大家整理的“SAT语法虚拟语气用法介绍”，希望通过上述内容的学习，大家能够做好SAT考试的复习，在接下来的SAT考试汇总，能够取得更好的成绩。预祝同学们考试拿到SAT的高分成绩。