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。
应该类的虚拟语气
1、应该做的事情 I should go!
2、非现实情况的描述 I should be working now!
3、懊悔不已的事情 I should have practiced more.
4、要求类动词后需要用虚拟语气，should 可以省略
如：require 命令;request 要求;reticent 沉默的;retinue 随从 innocent 无辜的;天真的 I DROP CAPS: insist, demmand/ desire require/ request order propose
command advice prefer s uggest
[P60-42]You _______ him so closely; you should have kept your distance.A) shouldn't follow B) mustn't followC) couldn't have been followingD) shouldn't have been following
[P59-32]The suggestion that the mayor _______ they prizes was accepted by everyone.
A) would present B) present C) presents D) ought to present
注：suggest + that 虚拟语气表建议should 可以省略suggest doing suggest 表明，不接虚拟
[P49-65]The manager of the hotel requests that their guests _________ after 11:00p.m.
A) not to play loud music B) shouldn't play loud music
C) don't play loud music D) couldn't play loud music
[P18-43]He suggested _________ to tomorrow's exhibition together.
A) us to go B) we went C) we shall go D) we go
[P17-55]I don't think it advisable that Tim _________ to the job since he has no experience.
A) be assignedB) will be assignedC) is assignedD) has been assigned
[P12-44]It is recommended that the project _________ until all the preparations have been made.A) not be started B) will not be started C) is not started D) is not to be started
[P26-28]It is politely requested by the hotel management that radios _________ after 11 o'clock at night.A) were not playedB) not to playC) not be playedD) did not play
It is + adj. + that 句型，should 可以省略的虚拟。
adj： important、necessary 、essential 、incredible、 strange、 natural、pity、ashame、no wander