特殊的虚拟语气词：should
1） It is demanded / necessary / a pity + that结构中的主语从句的谓语动词要用should 加动词原形， should 可省略。
句型：（1）suggested It is （2）important that+ （should） do（3） a pity
（1）suggested, ordered, proposed, required, demanded, requested, insisted； + （should） do
（2）important, necessary, natural, strange
a pity, a shame, no wonder
（3）It is suggested that we （should） hold a meeting next week.
It is necessary that he （should） come to our meeting tomorrow.
2）在宾语从句中的应用
在表示命令、建议、要求等一类动词后面的从句中。
order, suggest, propose, require, demand, request, insist, command, insist + （should） do
I suggest that we （should） hold a meeting next week.
He insisted that he （should ） be sent there.
注意： 如suggest, insist不表示建议 或坚持要某人做某事时，即它们用于其本意暗示、表明、坚持认为时，宾语从句用陈述语气。
The guard at gate insisted that everybody obey the rules.
判断改错:
（错） You pale face suggests that you （should） be ill.
（对） Your pale face suggests that you are ill.
（错） I insisted that you （ should） be wrong.
（对） I insisted that you were wrong.
3）在表语从句，同位语从句中的应用
在suggestion, proposal, idea, plan, order, advice等名词后面的表语从句、同位语从句中要用虚拟语气，即（should）+动词原形。
My idea is that we （should） get more people to attend the conference.
I make a proposal that we （should） hold a meeting next week.
1） It is demanded / necessary / a pity + that结构中的主语从句的谓语动词要用should 加动词原形， should 可省略。
句型：（1）suggested It is （2）important that+ （should） do（3） a pity
（1）suggested, ordered, proposed, required, demanded, requested, insisted； + （should） do
（2）important, necessary, natural, strange
a pity, a shame, no wonder
（3）It is suggested that we （should） hold a meeting next week.
It is necessary that he （should） come to our meeting tomorrow.
2）在宾语从句中的应用
在表示命令、建议、要求等一类动词后面的从句中。
order, suggest, propose, require, demand, request, insist, command, insist + （should） do
I suggest that we （should） hold a meeting next week.
He insisted that he （should ） be sent there.
注意： 如suggest, insist不表示建议 或坚持要某人做某事时，即它们用于其本意暗示、表明、坚持认为时，宾语从句用陈述语气。
The guard at gate insisted that everybody obey the rules.
判断改错:
（错） You pale face suggests that you （should） be ill.
（对） Your pale face suggests that you are ill.
（错） I insisted that you （ should） be wrong.
（对） I insisted that you were wrong.
3）在表语从句，同位语从句中的应用
在suggestion, proposal, idea, plan, order, advice等名词后面的表语从句、同位语从句中要用虚拟语气，即（should）+动词原形。
My idea is that we （should） get more people to attend the conference.
I make a proposal that we （should） hold a meeting next week.
