当主句的谓语动词是think, believe, guess, expect, imagine, suppose等时,如果宾语从句是否定结构,通常把主句谓语动词改为否定式,而将宾语从句改为肯定式,这种现象叫做否定转移。
I dont think we two have met before.
We dont believe that he could finish his work in such a short time.
She doesnt think it is right for John to come late to school.
三、表语从句 :通常置于主句的系动词之后,说明主句主语的情况。
My idea is that we should help her do housework every Sunday.
Is that why you had a few days off?
It is because I have never heard of the story.
四、同位语从句 :常置于某些名词之后,对其内容作解释或补充说明。如:
advice, demand, doubt, fact, hope, idea, news, order, problem, promise, question, request, suggestion, truth, wish, word等。
The news that we won the game is exciting.
There is no doubt that he is the best player in their country.
同位语从句与定语从句的区别:
同位语从句对所修饰词作补充说明,而定语从句对前面名词起限定作用;
that在同位语从句中只起引导作用,无词义,无语法成分,而在定语从句中指代所修饰词并在从句中作主语或宾语。
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