I asked him 后面是跟if he can 还是if he could?

问题描述:

I asked him 后面是跟if he can 还是if he could?

could
if he could作主句I asked him的宾语从句
从句用的时态应与主句中的时态一样
主句中asked是过去时 所以从句也应该是过去时
也就是could