Did John do well ________math and weak ___________English?do

Did John do well ________math and weak ___________English?do well in /on 这个短语在这里怎么填空

这个句子不成立呢.
你说的其实是两个短语：
do well in 在……学的好,擅长……
be weak in 在……差/弱,在……学的不好
前者是实意动词,后者是be 动词.
句子可以这样表达：
Did John do well in math and was he weak in English?
希望能帮到你,祝你开心.
再问： do well in / do well on 意思一样吧 我觉得on in / in in 都可以
再答： do well in 是固定搭配=be good at ，没有do well on 。