2、虚拟语气用于名词性从句

(1)虚拟语气在宾语从句中的运用。

①“wish + 宾语从句”表示不能实现的愿望,译为“要是……就好了”等。表示现在不能实现的愿望,从句中的谓语动词用一般过去时;表示将来不能实现的愿望,从句中的谓语动词用“would/could + 动词原形”;表示过去不能实现的愿望,从句中的谓语动词用“had + 过去分词”或“could(should) + have + 过去分词”。如:

I wish it were spring all the year round.

I wish I had known the answer.

I wish I could fly like a bird.

②在表示建议、要求、命令等的动词suggest、advise、propose、demand、require、insist request、command、order等后的宾语从句中,谓语动词用should + 动词原形或是动词原形。如:

She suggested we (should)leave here at once.

The doctor ordered she should be operated.

(2)虚拟语气在同位语从句和表语从句中的运用。

作表示建议、要求、命令等的名词advise、idea、order、demand、plan、proposal、suggestion、request等的表语从句和同位语从句,从句中的谓语动词用“(should) + 动词原形”。如:

His suggestion that we (should)go to Shanghai is wonderful.

My idea is that they (should)pay 100 dollars.

(3)虚拟语气在主语从句中的运用。

在主语从句中,谓语动词的虚拟语气用“should + 动词原形”的结构,表示惊奇、不相信、理应如此等。如:

It is necessary(important, natural, strange, etc.)that we should clean the room every day.

It was a pity (a shame, no wonder, etc.)that you should be so careless.

It will be desired(suggested, decided, ordered, requested, proposed, etc.)that she should finish her homework this afternoon.

注意:这种从句表示的是事实。如果说人对这种事实表现出惊奇的情感,就可用虚拟语气。反之,如果不表示惊奇等情感,that从句也可用陈述句语气。如:

It is pity that you can’t swim.

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