"She is becoming more and more beautiful" 是表达她越来越美丽的常用说法。

这句话由两部分组成，第一部分是主语 "she"，表示她；第二部分是谓语 "is becoming more and more beautiful"，表示她越来越美丽。其中 "is becoming" 是现在进行时的形式，表示正在变得；"more and more" 是副词，表示越来越；"beautiful" 是形容词，表示美丽。

下面是一些例句：

She is becoming more and more beautiful every day.
As she grows older, she is becoming more and more beautiful.
He couldn't help but notice that she was becoming more and more beautiful.

分别翻译为：

她每天都变得越来越美丽。
随着她年龄的增长，她变得越来越美丽。
他禁不住注意到她正在变得越来越美丽。