下面是SAT语法难点之虚拟语气，参透SAT语法题型的本质和精髓，抓住核心备考要素，有针对性的学习、备考，才是通往SAT语法高分的途径。
1，条件句，首先你要学会判断是否该虚拟，一般说来，可能实现的事实是不用虚拟的，比如
if it rains tomorrow , i will not go to the zoo.
In my childhood if it rained, I would stay(would 这里是情态动词，表示习惯) at home
如果作为大胆不大可能的假设，就要虚拟，下面是分别对过去，现在，将来的大胆假设
1，过去， If I had worked hard earlier, I would have been admitted to Harvard.
从句： 过去完成时， 主句：would have done. 过去将来完成时
2,现在， if I were you , I would work harder.
从句：一般过去时(记住，was 用were替代)， 主句：would do 过去将来时
3将来，If the sun rose in the west tomorrow, I would marry you.
If the sun were to rise in the west tomorrow, I would marry you.
If the sun should rise in the west tomorrow, I would marry you.
从句：一般过去时 或 were to do 或 should do, 主句： would do 过去将来时
上面三个，可能性依次减小，其中should do 最小，翻译为“万一”
ETS还考查，虚拟条件句中的省略，根据规定，if从句中有had, were, should 三个词之一的时候，if可以省掉，将
助动词提前。因此上面的句子可以改成
Were the sun to rise in the west, I would marry you.
Should the sun rise in the west, I would marry you.
Had I worked hard earlier, I would have been admitted to Harvard.
ETS还考查 混合虚拟条件句，就是从句 和主句针对不同的时间进行假设，采用不同时间的从句主句拼凑)
If I had worked hard earlier (针对过去假设)， I would be in Yale now (针对现在假设)
If he were here(针对现在)，I would have known that yesterday(针对过去的假设)
ETS也考查含蓄的虚拟条件句，就是省掉从句的虚拟句，比如
But for (要不是，固定搭配) John's help, I would have died of hunger yesterday.
Given more water, it would grow better(不大确定)
虚拟语气考的固定搭配，if it were not for... if it had not been for,要不是
这是最tricky的，有时候还结合省略考。
If it were not for your money, our life would be in trouble
Were it not for your money, our life would be in trouble.
If it had not been for John's food, I would have died of hunger.
Had it not been for John's food, I would have died of hunger.
wish ,would rather, as if 后的虚拟格式等同于if条件句中从句的虚拟格式
I wish i had killed you yesterday. I wish I were young.
He talks as if he were the president. He talks as if he had been to the moon before.
I would rather you died at once. I would rather you had told me the truth yesterday.
表示建议，要求，命令,纯粹主观判断的虚拟，在美国英语中使用动词原形。记住，美国英语和英国英语不一样，英国英语允许should do。
I ordered that he go.
I propose that he be given the money.
It is natural/important/ essential/ imperative that he work hard.
The resolution is that he be killed immediately.
关于so/such ....that..... that从句中有情态动词表示目的，没有，表示结果
He got up so early that he caught the first train.他早起，以至于赶上了头班车
He got up so early that he might catch the first train。他早起，为了赶上头班车。
以上便是小编为大家整理的SAT语法难点之虚拟语气，希望对大家有所帮助。更多SAT考试相关资料尽在SAT考试站，小编祝大家都能取得理想的SAT考试成绩。
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