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。
2．宾语从句
虚拟语气常用在表示要求、建议、命令或愿望的动词后的宾语从句中。
常见的宾语从句中需用“should+动词原形”的动词有：
一个坚持：insist
两个命令：order,command
三个建议：suggest,advise,propose
四个要求：demand,require,ask,desire
①在suggest（建议）,
order(命令), propose(建议),
insist（坚持要做）, command (命令)，request（要求），advise（建议）等动词后的宾语从句中，谓语动词用should
+动词原形（美国英语常省略should）。
The
examination instructor asked that the students (should) not use a calculator.考官要求学生不要使用计算器。
The
workers demanded that their wages (should) be raised by 10 percent.工人们要求增加百分之十的工资。
They
requested that he (should) sing a song.他们要求他唱一首歌。
比较：
动词suggest和insist后面的宾语从句，应根据不同情况选用陈述语气或虚拟语气。
suggest作“建议”解时，用虚拟语气，作“使想起、暗示”解时，用陈述语气。
His
silence suggested that he agreed with my decision.他的沉默暗示他赞同我的决定。（暗示）
He
suggested that I (should) stick to my decision.他建议我坚持自己的决定。（建议）
insist作“坚决要求”解时，用虚拟语气，作“坚持认为”解时，用陈述语气。
He insists
that doing morning exercises does good to people's health.他坚持认为做早操对健康有益。（强调）
He
insists that he (should) do morning exercises every day.他坚持每天都要做早操。（要求）
②在动词wish后的宾语从句中用虚拟语气，表示不可能实现的愿望。
一般过去时weredid 表示目前不可能实现的愿望
I wish
I were a bird.但愿我是一只小鸟。
I wish
I knew the answer.我要是知道答案就好了。
过去完成时 had done
表示过去不可能实现的愿望
I wish
she had taken my advice.那时她要是接受我的建议就好了。
I wish
that I had seen her yesterday.真希望我昨天见过她。
过去将来时wouldcould
do表示将来没有把握或不可能实现的愿望
I wish
you would stay an hour longer.我希望你再呆一个小时。
I wish
it could stop raining.但愿雨能停。
提示：
由于wish和hope的汉语意思差不多，在使用上往往容易出错。wish一般表示“希望”、“但愿”，表示不可能实现的愿望，后接从句时要用虚拟语气；hope表示“希望”，指可以实现的希望，后接从句时用陈述语气。
The
students hope that their football team will win the game.学生们希望他们的足球队获胜。（可能实现）
I wish I
could see him now.我希望现在就能看到他。（不可能实现）
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