本句中为什么是become,而不是became.发生在过去嘛

问题描述:

本句中为什么是become,而不是became.发生在过去嘛
In 1993 she created drawings for a children's book and saw it become a best-seller.

see 是感官动词,后接动词原形,也可以接现在分词,强调看见的动作正在进行.
本句话不存在强调动作正在进行,所以用become.became当然不能用