<P>I am good at English,but he&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </P>
<P>请问he 后面，填isn't还是doesn‘t?</P>
<P>为什么？</P>

isn't
be动词对应
but he isn't是指but he is not good at English.

什么呀没看懂，完整的题目呢

应该是isn't
do well in 用doesn't

对呀，是省略句
省略了good at,,,,,,,,,,,,,

是but he is not good at English

I'm good at English, but he isn't （good at English).&nbsp;&nbsp;

I'm good at English, but he isn't .
I do well in English,but he doesn't.

I'm good at English, but he isn't .
I do well in English,but he doesn't.