I like to watch the birds fly in the sky.

题目

I like to watch the birds fly in the sky.
为什么用fiy 而不用fiying?

答案

看看牛津伤的区别就可以了!
doing
She watched the children crossing
她看着孩子们横过马路（但不一定注视全过程）.
do
She watched the children cross the road,
她看着孩子们横过了马路（注视着全过程）.