1．在it is/was suggested/requested/required/ordered/proposed etc. that ...句型中，从句常用虚拟语气，即(should＋)动词原形。

　　It is required that the students (should) wear school uniforms at school.

　　学校要求学生在学校必须穿校服。

　　It is ordered that the prisoner (should) be transferred to the county jail.

　　按照命令这名囚犯将被转押到县监狱。

　　2．It is/was important/necessary/natural/strange/a pity/no wonder ... ＋that sb. (should) do ...

　　It is a pity that he (should) fail to pass the driving test.

　　真遗憾他竟然没有通过驾驶测试。

　　It is important that every pupil (should) be able to understand the rule of school.

　　重要的是学生都能了解校规。

　　三、表语从句和同位语从句中的虚拟语气

　　表示"坚持""命令""建议""要求"等的名词后面接同位语从句、表语从句时，从句中谓语动词用"should＋动词原形"，should可以省略。

　　His suggestion is that we (should) learn from this mistake.

　　他建议我们从这次错误中吸取教训。

　　Our teacher put forward a suggestion that we (should) decorate our classroom with some pictures that we had drawn.

　　老师建议我们用自己画的画装饰教室。

　　四．as if/though引导的从句和It's (high) time (that) ...句式中的虚拟语气

　　1．as if/though引导的表语从句和方式状语从句中虚拟语气的使用

表示与现在事实相反或对现在情况有所怀疑 过去时(be动词一律用were) 表示对过去事实的假设 过去完成时 　　It seems as if it were spring.

　　现在好像是春天似的。

　　She appeared as if she had known nothing about it.

　　她看上去对此一无所知。

　　2．It's (high) time (that) ...句式中的虚拟语气

　　在It's (high) time (that) ...句式中，从句谓语动词用过去式或"should＋动词原形"。

It's time that we did/should do something for our country.