When Tony speak Chinese,he always feel nervous中feel不应加s吗
题目
When Tony speak Chinese,he always feel nervous中feel不应加s吗
答案是这样的：Tony often feel nervous when he speaks English
答案
Tony often feels nervous when he speaks English.
虽然feel在这里作“系动词”,但依然要加s.
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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