2018年公共英语三级听力题型剖析：虚拟语气与条件关系题
1、虚拟语气与条件关系如何区分
2、条件关系句型都有哪些
if, unless, suppose, in case, as long as, with / without
3、虚拟语气的句型
1)if虚拟句
a、表示与现在事实相反的虚拟语气，谓语的主要形式为：
从句：过去式
主句：should / would / could / might + 动词原形
b、表示与过去事实相反的虚拟语气，谓语的主要形式为：
从句：had + 过去分词
主句：should / would / could / might + have + 过去分词
c、表示与将来事实相反的虚拟语气，谓语的主要形式为：
从句：过去式
主句：should / would / could / might + 动词原形
特殊形式：
当从句所发生的时间与主句发生的时间不一致时，可以使用错综时间条件句
如：一个是与过去事实相反，一个是与现在事实相反
If we had left a little earlier, we wouldn't be late.
2)If only后的从句，用过去时表示与现在相反，用过去完成时表示与过去相反，也可用情态动词could, would等 + 动词原形，表示对将来的憧憬，如：
If only it would stop snowing!
3)用as if, as though引导的状语从句中多用虚拟语气，用过去时表示与现在相反，用过去完成时表示与过去相反，如：
You look as if you had seen a ghost.
4)在以for fear that, lest, in case引导的目的状语从句中，可以用should + 动词原形表示虚拟，也可以用may或might，如：
He is studying hard for fear that he should / might / may fail the exam.
5)wish后面的虚拟宾语从句，用过去时表示与现在相反，用过去完成时表示与过去相反，也可用情态动词could, would等 + 动词原形，表示对将来的憧憬，如：
I wish I had been to France.
4、虚拟语气与关系推理题答题的要领
虚拟语气和条件关系句都是考点句。二者的推理方式不同，因为虚拟语气句往往与事实相反，所以考的是正反推理;条件关系句考的是假设推理，因此区分虚拟语气与条件关系句是解题的关键。
W: I wish my hair was longer.
M: Yes, pity you had it cut. If only you'd listened to me.
Q: What can we learn from the dialogue?
A) The man didn't want the woman to have her hair cut.
B) The woman followed the man's advice.
C) The woman is wearing long hair now.
D) The man didn't care if the woman had her hair cut or not.
答案是A。
