Rent mounts month by month.

租金每月都在上涨。

He save up a little month by month.

他每月一点点地储蓄。

He saves up a little month by month.

他每月一点点地储蓄。

However, you still pay the rent month by month.

不过，房租还是月付的。

He just pushes the right buttons month by month.

他只是逐月地推动正确的按钮。