英语虚拟语气,假设情况中,什么叫与现在事实相反,与将来事实相反,与过去事实相反.需要举列说明.
题目
英语虚拟语气,假设情况中,什么叫与现在事实相反,与将来事实相反,与过去事实相反.需要举列说明.
答案
英语虚拟语气的大的原则是“时态倒推法”,如下:
与现在事实相反谓语动词用过去时,如例句所示:If I knew her telephone number,I would call her.
If I were a bird,I would fly aroud the world.
与将来事实相反用三种表示法:谓语动词用过去时;should do;were to do.
例句:If he came/should come/were to come tomorrow,I would go to the airport to meet him.
与过去事实相反谓语动词用过去完成时,例句如下:
If I had read that book,I would be able to answer the teacher's question now.
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已知函数f(x)=x,g(x)=alnx,a∈R.若曲线y=f(x)与曲线y=g(x)相交,且在交点处有相同的切线,求a的值和该切线方程.
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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