I didn't know whether mother______(take)me to Beijing next month.

I didn't know whether mother______(take)me to Beijing next month.
I didn't know whether mother______(take)me to Beijing next month.

I didn't know whether mother______(take)me to Beijing next month.
would take,说的是一件过去发生的事

would take

will take

will take 还没有发生的事情