二、名词性虚拟语气：
在表示命令、建议要求、惊叹时的名词性从句中需用虚拟语气，基本句型：主语＋（should）＋动词原形，如：Mother insisted that John go to bed at 9 o’clock.（宾语从句）
We suggested that the meeting should not be held.
It was required that the crops should be harvested at once.（主语从句）
The suggestion that he be invited was rejected.（同位语从句）
That is their demand that their wages be increased.（表语从句）
注意：在这种句子中绝不出现“would”“must”“could”等。
三、虚拟语气在一些特殊词中的使用或含蓄条件句：
1、wish后的宾语从句：
与现在愿望不一致 主语＋过去时；I wish I were you.
与过去愿望不一致 主语＋had＋过去分词；I wish I had visited the white House when I was in the states.
与未来愿望不一致 主语＋would（could）＋原形。I wish I could meet you tomorrow at the party.
2、It’s time句型：当It’s time后用that从句时应该为：主语＋should＋原形 或 主语＋过去时，例如：
It’s time that you went to school. 或It’s time that you should go to school.
3、If only引起的感叹句相当于“How I wish＋宾语从句”
If only he could come! 他要能来就好了。
If only I had known the answer! 我要早知答案就好了。
4、would rather, as if（though）引导的句子也需使用虚拟，表示过去的情况用过去完成时，表示现在与将来的情况用过去时，如：
I’d rather you posted the letter right away.
I’d rather you had returned the book yesterday.
She loves the children as if they were hers.
Alan talked about Rome as if he had been there.
5、without, but, but for, otherwise引起的短语或句子常暗含着含蓄条件。
Without you, I would never know him.
But for your cooperation, we wouldn’t have done the work so well. = If it were not for your cooperation, we we wouldn’t have done the work so well.
注： without / but for … = If it weren’t not for…/ If it hadn’t been for …., sb …..
But that she was afraid, she would have said no.
I would be most glad to help you, but I’ am busy now.
I am busy now; otherwise I would do you the favor!
