5)以上句型可以转换成下列形式:①从句省略if,用倒装句式were,had,should+主语。例如:Were I in school again,I would work harder. Had you been here earlier,you would have seen him. Should there be a meeting tomorrow,I would come.②用介词短语代替条件状语从句。例如:Without air, there would be no living things. I would not have succeeded but for your help.
2.虚拟语气用于宾语从句
1)wish+宾语从句表示不能实现的愿望,汉语可译为可惜、就好了、悔不该、但愿等。表示现在不能实现的愿望,从句的谓语动词用过去式;表示将来不能实现的愿望,用would(could)+动词原形表示过去不能实现的愿望,用had+过去分词或(could)would+have+过去分词。
例如:
I wish we could go to the seaside today.
I wish you told me earlier.
We wish we had arrived there two hours earlier.
2)虚拟语气在动词arrange,command,demand,desire,insist,order,propose,request,require,suggest等后面的宾语从句中,用(should)+动词原形。例如:
I suggested that the meeting(should)be put off.
The doctor ordered that she(should)stay in bed for a few days.
They demanded that the black people should be treated as well as white people.
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