其它

状语从句 as if/as though引导的状语从句中动词用did或had＋done或would／could／might＋do。

注意：as if/as though引导的状语从句中也可以用陈述语气：

当说话者认为所述的是真实的或极有可能发生或存在的事实时：

It sounds as if it is raining．听起来像是在下雨。

He talks as if he is drunk．从他谈话的样子来看他是醉了。 ①与现在事实相反

He talks as if he knew where she was．

②与过去事实相反

He talks about Rome as if he had been there before.

③与将来事实相反

He opened his mouth as if he would say something. in order that/so that引导的状语从句中动词用can/could/may/ might/ would等+do Turn on the light so that we can see it clearly. 宾语从句 demand, suggest, order, insist后接的从句中动词为should+do He suggested that we not change our mind. wish后的从句中分别用过去式，过去完成式和should/would+do表示与现在，过去和将来情况相反 I wish I could be a pop singer.

I wish I would have gone to Shanghai last month. 主语从句 在It is necessary / important / strange that...

It is suggested / demanded/ ordered / requested that...等从句中，

谓语动词用should+do It is strange that such a person should be our friends. 其它

句型中 It is time that...句型中动词用过去式或should+do It's high time that we left/should leave. would rather所接的从句中动词用过去式或者过去完成式 I would rather you stayed at home now. If only句型中动词常用过去式或者过去完成式，表示强烈的愿望 If only our dream had come true!