Not only.but also 倒装句
题目
Not only.but also 倒装句
____the old man to the hospital but he also paid for the medical fee
A.Not only did the student send
B Not only the student sent
C Not only did the student sent
D The student did not only sent
跪求CD不能选的原因
答案
C项Not only did the student sent中已经有助动词DID了,所以动词SEND需要用原型.D项The student did not only sent完全不符合NOT ONLY语句（也是通用的提前副词成分的）倒装的规则.
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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