疯豆名词性从句中的虚拟语气
主句中的动词、名词、形容词如表示要求、建议、命令或愿望等含义，与其相关的名词性从句（主语从句、宾语从句、表语从句和同位语从句）中的谓语动词要用虚拟语气。
1．主语从句中的虚拟语气
主语从句通常用于“It is +形容词名词动词的-ed形式+ that ...”结构。主语从句中是否用虚拟语气取决于所用的形容词或动词的-ed形式，其谓语动词常用“should +动词原形”（美国英语常省略should，只用动词原形）。
①表示建议或命令
It is important that we (should) work out a study plan.重要的是我们要制订出一个学习计划。
It will be better that we (should) meet some other time.最好我们在另一个时间见面。
It is suggested that each student (should) sing a song in English.有人建议每个学生都要唱一首英文歌曲。
It is demanded that he should leave at once.要求他立刻离开。
②表示惊讶
It is strange that he should have failed to see his own shortcomings.真奇怪他竟看不到自己的缺点。
It is a pityshame that I should be at school instead of lying here in hospital.真可惜，我应当在学校而不是躺在医院里。
It is natural that you should forget it first.你起先记不住是很自然的。
必背：
常见的要接含有虚拟语气主语从句的词
形容词：important, necessary, urgent, essential, vital, natural, strange, proper等
动词的-ed形式：arranged, suggested, ordered, required, desired, demanded, proposed等
It is necessary that the program (should) be loaded into the computer.有必要把程序输入电脑。
It is strange that he should have learned so much in such a short time.很奇怪他竟然在如此短的时间内学了那么多的东西。
It is desired that we (should) get everything ready by tonight.希望一切在今晚前准备就绪。
主句中的动词、名词、形容词如表示要求、建议、命令或愿望等含义，与其相关的名词性从句（主语从句、宾语从句、表语从句和同位语从句）中的谓语动词要用虚拟语气。
1．主语从句中的虚拟语气
主语从句通常用于“It is +形容词名词动词的-ed形式+ that ...”结构。主语从句中是否用虚拟语气取决于所用的形容词或动词的-ed形式，其谓语动词常用“should +动词原形”（美国英语常省略should，只用动词原形）。
①表示建议或命令
It is important that we (should) work out a study plan.重要的是我们要制订出一个学习计划。
It will be better that we (should) meet some other time.最好我们在另一个时间见面。
It is suggested that each student (should) sing a song in English.有人建议每个学生都要唱一首英文歌曲。
It is demanded that he should leave at once.要求他立刻离开。
②表示惊讶
It is strange that he should have failed to see his own shortcomings.真奇怪他竟看不到自己的缺点。
It is a pityshame that I should be at school instead of lying here in hospital.真可惜，我应当在学校而不是躺在医院里。
It is natural that you should forget it first.你起先记不住是很自然的。
必背：
常见的要接含有虚拟语气主语从句的词
形容词：important, necessary, urgent, essential, vital, natural, strange, proper等
动词的-ed形式：arranged, suggested, ordered, required, desired, demanded, proposed等
It is necessary that the program (should) be loaded into the computer.有必要把程序输入电脑。
It is strange that he should have learned so much in such a short time.很奇怪他竟然在如此短的时间内学了那么多的东西。
It is desired that we (should) get everything ready by tonight.希望一切在今晚前准备就绪。
