摘要：大学英语四级语法要从词类、时态语态、从句等方面进行学习。以下是精品学习网为考生提供的2013年大学英语四级考试语法的考核重点分析和复习方法指导。
事实相反类的虚拟
1、与现在事实相反：用一般过去时(系动词用were)
I wish I were not here.
2、与过去事实相反：用过去完成时
I wish I had passed CET-4.
I wish I could have passed CET-4. (非正式表达方式)
[P56-58]Sometimes I wish I ______ in a different time and a different place .
A) be living B) were living C) would live D) would have lived
[P56-56]Although many people view conflict as bad, conflict is sometimes useful it forces people to test the relative merits of their attitudes are behaviors.
A) by which B) to which C) in that D) so that
[P56-57]He is ______ about his chances of winning a gold medal in the Olympics next year.
A) optimistic B) optional C) outstanding D) obvious
注：1. optimistic 乐观的2. optional 可选择的3. outstanding 突出的
[P56-64]It is essential that these application forms ______ back as early as possible.
A) must be sent B) will be sent C) are sent D) be sent注：It is + adj. +that 句型。
[P11-70]Look at the terrible situation I am in! If only I _________ your advice.
A) follow B) had followed C) would follow D) have followed
注：表示与过去事实相反。
[P12-45]I wish I _________ longer this morning, but I had to get up and come to class.
A) have slept B) slept C) might have slept D) could have slept
注：表示与过去事实相反。
3、对将来事实可能出现的现象的否定推测，用虚拟语气。
I wish you couldn't smoke any more.
would/ could/ should/ might + v.
用be to 表示将来，虚拟语气中经常出现were to do(考点)
I am to go shopping. ---I were to go shopping.
If only I were to go shopping.
[P35-47]If only the committee _______ the regulations and put them into effect as soon as possible.
A) approve B) will approve C) can approve D) would approve