come to do 与become to do有

问题描述

表示开始做某事，英语可用come to do 与become to do，请问它们的区别是什么？比如：

As she __________ to know him better she relied on him more.

I slowly __________ to realize that she knew what she was doing.

该填 came 还是 became？

老师答疑

刘老师：

表示“开始做某事”，英语通常用begin to do或start to do。当不定式的动作表示心理或意识的概念时，如know, understand, realize, see（明白）等，这时用come to know 或get to know，可表示这层意思。come to know 或get to know表示一种“渐变”过程，不是一下子明白或懂得。

become to do是错误的表达，没有这种用法。