用所给词的适当形式填空I would rather drink black than --- (put)some mil

用所给词的适当形式填空I would rather drink black than ___ (put)some milk in it.I would rather drink black coffee than ___ (put)some milk in it.用put为什么不用 putting呢？（put）不是做coffee的后置定语吗？（put）前不是应省略了 drink coffee吗？ 原“形”的“形”！！！！