1. 通过本课的学习，能够全面掌握名词性从句中虚拟语气的基本用法。
2. 通过本课的学习，能够初步了解虚拟语气在不同类型名词性从句中的具体用法。
重点：掌握与坚持、命令、建议、要求四类词相关名词性从句中虚拟语气的用法。
难点：wish宾语从句中虚拟语气的用法。
近几年高考对于虚拟语气的考查主要集中在语法填空和书面表达中，语法填空涉及动词提示词的填空中多次出现对虚拟语气的考查，考查难度不大。
一、主语从句中的虚拟语气：
1. It is／was + 形容词+ that从句
当形容词为important, necessary，strange，natural，appropriate, proper, right, desirable, essential, surprising, unthinkable等或名词短语a good idea时。
2. It is／was + a pity / a shame / a surprise / no wonder + that从句
3. It is demanded / suggested / ordered / required / ….that-clause
注意：
这种主语从句由连词that引导，虚拟语气为“（should）动词原形”。其中should可省略。should 常译成“应该、必须、竟然”。
It is important and necessary that we (should) master a foreign language.
精通一门外语对我们来说是重要而且必要的。
It is proper that an independent inquiry (should) take place.
进行独立调查很合适。
It is strange that he (should) refuse your help.
他竟然拒绝你的帮助真是奇怪。
It is surprising that you (should) not understand me!
你竟然不理解我，真令人吃惊！
It’s a pity that you (should) miss a good chance.
你竟然错过一个好机会真是遗憾。
It is suggested that he (should) not spend too much time watching TV.
有人建议他不应该花太多时间看电视。
It is proposed that the plan (should) be delayed.
有人建议推迟这项计划。
—Yang Liwei has won great honour for our country.
—Who is Yang Liwei?
—What a question! It is surprising ________ the first spaceman in China.
A. you didn’t know our national hero
B. to you not to know him
C. you should know nothing about
D. you knew nothing about
答案：C
思路分析：在it is surprising后的that从句中，谓语要用“should +动词原形”，其中should 含“竟然”之意，是最佳答案。
二、宾语从句中的虚拟语气：
1. wish后宾语从句须用虚拟语气：⑴表示与现在事实相反的愿望，从句谓语须用过去式（were）；⑵表示与过去事实相反的愿望，从句谓语须用had+过去分词；⑶表示将来没有把握或者不大可能实现的愿望，从句谓语须用would / could / might+动词原形。
2. 与坚持、命令、建议及要求四类词相关的宾语从句中需要用（should）+动词原形的虚拟语气。这四类词包括⑴一个坚持：insist；⑵两个命令：order，command；⑶三个建议：advise，suggest，propose；⑷四个要求：demand，request，require，desire / ask。
I wish (that) I could fly freely in the sky.
我希望我们能够在天空中自由飞翔。
I wish I had seen you at the party yesterday.
我真希望在昨天的宴会上见到你。
I wish I would have another chance next year.
我希望下一年还有机会。
He ordered that the students (should) wash the clothes every week by themselves.
他命令学生们每周自己洗衣服。
The doctor suggested that she (should) have an operation at once.
医生建议她立刻手术。（should省略后，she后会紧接着have，这是正确的）
Mr. Li required the computer equipment referred ________ used in every classroom.
A. should be
B. have to be
C. to be
D. to being
答案：C
思路分析：句中referred to是过去分词短语，作the computer equipment 的定语，意为“被提到的计算机设备”；在表示“要求”的require, request, ask, demand等动词后的宾语从句的谓语要用“(should+)动词原形”，所以从句的谓语动词是be used，省略了should。
三、表语从句中的虚拟语气：
1. 在名词“suggestion, proposal, idea, plan，order, advice, desire, requirement, request, command, decision, recommendation等”作主语时后面的表语从句中，用“should+动词原形”，其中should可省略。
2. as if ( as though)引导的表语从句中的虚拟语气。
My advice is that we (should) get more people to attend the conference.
我的建议是我们应该让更多的人参加会议。
My demand is that she (should) come to see me once a week.
我的要求是她应该一周来看我一次。
It seems as if the meeting would never end.
看来会议没完没了。（与将来相反）
It seems as though he had been there many times.
好像他已经去过那里好多次了。（与过去事实相反）
It seems as if nobody knew what happened.
好像没有人知道发生了什么事。
What the customers _________ from the company is that the goods _________ right to their homes.
A. requested, deliver
B. demand, be delivered
C. request, should deliver
D. demand, delivered
答案：B
思路分析：从is可知what从句中的谓语动词request或demand用一般现在时，表示一般状况；而动词request / remand有关的表语从句用虚拟语气：（should）+动词原形。第二空动词deliver与主语the goods是被动关系，省略should后，填be delivered。
四、同位语从句中的虚拟语气：
