Check the price before you decided___to buy it.
问题描述:
Check the price before you decided___to buy it.
为什么是whether不是if?具体理由!
答
不定式之前只能用whether不能用if
Check the price before you decided___to buy it.
为什么是whether不是if?具体理由!
不定式之前只能用whether不能用if