(2) 表示“要求、建议、命令”等动词后面的宾语从句中的虚拟语气。用于此结构的动词有:advise, direct, agree, ask, demand, decide, desire, insist, order, prefer, propose, request, suggest等。从句的谓语动词用“should + 动词原形”,其中should 可以省去。例如:
I insisted that he (should) go with us. 我坚持让他和我们一起去。
注意:当insist 表示“坚持认为”、suggest表示“表明,显示”时,不用虚拟语气。例如:
He insisted that she was honest. 他坚持认为她是诚实的。
3.主语从句中的虚拟语气。
(1) It be + 形容词 + that... (should)...。用于该句型的形容词有:necessary, good, important, right, wrong, better, natural, proper, funny, strange, surprising等。例如:
It's natural that he should feel hurt. 他感到疼是很正常的。
(2) It be + 过去分词 + that... (should)...。用于该结构中的过去分词是表示“建议、请求、命令”等词的过去分词。如: desired, suggested, requested, ordered, proposed等。例如:
It is desired that the building of the house be completed next month. 真希望这所房子在下个月前就能竣工。
(3) It is time (about time / high time) that... + (过去时或should + 动词原形)...。例如:
It is high time I went home now. = It is high time I should go home. 我该回家了。
(4) 表语从句、同位语从句中的虚拟语气。在suggestion, proposal, order, plan, idea, advice, decision等需要具体内容解释的名词后要使用虚拟语
虚拟语气if的三种用法如下:
表示与现在事实相反的情况、表示与过去事实相反的情况、表示与将来事实相反。
表示与现在事实相反的情况:
1、从句:If+主语+动词一般过去时(Be动词用were)。
2、主句:主语+ should/would/might/could+do。
3、例句:If I were you,I would take an umbrella。
表示与过去事实相反的情况:
1、从句:If+主语+had+done。
2、主句:主语+should/would/might/could+have done。
3、例句:If he had taken my advice,he would not have made such a mistake。
表示与将来事实相反:
1、从句:if+主语+were to do。
2、if+主语+should+do。
3、if+主语+动词一般过去式(be动词用were)。
4、例句: