i can't decide which to buy.为什么用to buy?buying可以吗
问题描述：
i can't decide which to buy.为什么用to buy?buying可以吗
答
不能，虽然我对语法不懂，但是我很肯定，不能。多看点外国电视就有感觉了
答
不能，这种句子只能用to buy，不定式表将来的事。没有decide which buying的用法。
相当于decide to buy which。反正你只要记着这种形式就用to buy……就行了
答
不行,因为这句话中to buy 修饰which,而言buying是动名词,不可以修饰宾语.但不定式可以修饰宾语.
例子：
I wish him to be at the meeting.
They thought the moon to be inhabited.