语法的考点比较凌乱，但是都是有规律可循的，下面是SAT语法中语态和虚拟语气的使用，是每年的考试中都会出现的语法点，一起来学习下吧。
一.语态
语态包括被动和主动，看主语是如何发出动作的。针对SAT语法中对时态的考察，百利天下名师为大家总结了应对方法，就是两“动”相遇，“主动”胜，也就是说如果出现了两个选项都正确的情况，主动形式的表达要优先与被动形式的表达。
二.虚拟语气
1. 虚拟语气
语气包括陈述语气，祈使语气，虚拟语气。
虚拟语气包括英语中的时态有过去现在将来之分，所以虚拟语气也就简单的分为对过去虚拟，对现在虚拟，和对将来虚拟。
对过去虚拟：I did not come yesterday
I wish I had come yesterday
对现在虚拟：I am a common people
I wish I were superman
对将来虚拟：iwill grow up one day.
I wish I would not grow up
2. If 条件句中的虚拟语气
If 条件句可以分为两类，一类为真实条件句，一类为非真实条件句
If条件句的结构ifA，B.
真实条件句是指现实中存在有可能发生的。
If he is free, he will ask me to tell stories.
虚拟条件句：
建立在虚拟条件上面会发生的事情。
If I were you, I would go at once.
a. 与过去事实相反
If A：主语+had done
B:主语+should/would/could/might have done.
例如：I f I had got there earlier, I would have met her .
b.与将来相反
If A：主语+were to do
B:主语+should/would/could/might do.
A：主语+were/did
B:主语+should/would/could/might do.
A：主语+should do
B:主语+should/would/could/might do.
例如：if he should come here tomorrow, I would talk to him
C.if 条件句中的倒装：
当句子中含有were had should时，可以省略if，if从句要采用部分倒装。
举例：if I were Tom, I would refuse.
Were I Tom, I would refuse.
举例：if it had not been for the bad weather we would have arrived on time
Had it not been for the bad weather, we would have arrived on time.
三.SAT语法中虚拟语气和语态真题解析
If every nation were completely self-sufficient and operated under a free-market economy, the world'sfood supply will be governed solely by the economicsof supply and demand.
(A) will be (B) would have been (C) was to be (D) was (E) would be
句意：如果每一个国家都能够完全自给自足，并且在自由市场经济形势下运转，那么世界的粮食需求就会仅仅被经济的供求所控制。
解析：前面说假如我们可以自给自足实际上我们还不能，这就是对现在事实的虚拟，因此if从句中的内容与现在事实相反，是对虚拟语气的考察，整个句子是与现在情况相反的，从句使用的是if...did(were)的句式，因此主句谓语形式就应该使用would do的形式，选E。
6. The flag is risen each morning over government buildings in Washington.
(A) The flag is risen each morning over government buildings in Washington.
(B) Each morning the flag is rising over government buildings in Washington.
(C) The flag is raised each morning over government buildings in Washington.
(D) Government buildings in Washington have the flag to be raised over them each morning.
(E) Each morning the flag can be seen raising over government buildings in Washington.
题目：红旗每天早晨都会从华盛顿的政府大楼前升起。
解析：C，该题考察语态的使用，rise是不及物动词，故没有被动语态排除AB，D中根据主动大于被动的原则应该flag主语，而不是大楼。E中也是表述的过于繁琐。
以上给大家分享的是关于SAT语法中语态和虚拟语气的使用问题，希望对大家的备考有所帮助，预祝大家取得好成绩。
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