四、主语从句中的虚拟语气
在表达惊异、惋惜、遗憾、理应如此等意义的主语从句中常使用虚拟语气，其虚拟语其的结构为： should + 动词原形，主句中的谓语动词形式不限。
句型：
(1) It is admirable / dreadful / extraordinary / odd / remarkable / sad / advisable / annoying / disappointing / surprising / upsetting / frightening / better / best / curious / desirable / important / strange / peculiar / proper / necessary / natural …that…
(2) It is a pity / a shame / no wonder…. that…
(3) It is suggested / requested / desired / proposed /…. that …
(4) It worries me that…
如：It is important that we should do well in our lessons first. 我们先把功课学好很重要。
It is strange that he should not come. 很奇怪，他竟没有来。
It is a pity that we should not meet last night. 真遗憾我们昨天晚上没有见过面。
It worries me that we should be blamed for that. 我们竟要受责备真让人烦恼。