现在完成时句子结构及例句10条.
题目
现在完成时句子结构及例句10条.
现在完成时句子结构
答案
现在完成时的结构;助动词have /has + 动词的过去分词.He has been to Beijing.I have had supper .He has read the book.She has finished her homework.Jim has done his homework.He has finished the work.We ha...
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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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