Which do you enjoy___(spend)your spare time,surfing the Internet or reading?这里为什么用to spend 而不用spending?

问题描述:

Which do you enjoy___(spend)your spare time,surfing the Internet or reading?
这里为什么用to spend 而不用spending?

因为do you enjoy在这里作为插入语,也就是说承受enjoy这个动作的不是spend,而是Which,即你喜欢的不是花费时间,而是花费时间的方式.而且用to +动词原形表目的:你想用哪种方式(为了)来度过时间.
这样说能明白吗?

Which do you enjoy,surfing the Internet or reading?
网上冲浪,阅读,你喜欢哪个?
to spend your spare time 用来度过你的空闲时间。目的状语

enjoy sth to do sth
只不过换个位置而已
enjoy 后面接的是doing 只是迷惑了你