SAT语法题：Improving Sentences
题目
SAT语法题：Improving Sentences
Naomi and Charles will represent Ammonton High in the debating 【contest,their work in this having been excellent this year.】
改为contest,for their work have been excellent this year而不是
contest,for this year they have done excellent work in this
求分析
【Being as she is a gifted storyteller】,Linda Goss is an expert at describing people and places.
改为A gifted storyteller而不是 Telling story giftedly 的原因,求分析.
答案
第一题：逗号不能连接两个句子,中间必须有连词相连.所以,for在这里当连词用,而不能当介词.for this year成介词了.
第二题：现在分词做状语,一般都是伴随状语.而本句的主句只是陈述一个事实,没有事件的发生,所以不用现在分词.
举一反三
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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