pretty的比较级和最高级怎么写

例句：
1.She's so obviously cleverer and prettier than I am.
她明显要比我聪明、漂亮得多。
2。She was at her prettiest in her late teens, but even then she always had somebody who was prettier.
她在十八九岁的时候最漂亮，但是即使在那时，也总有人比她更漂亮。
3.The house is located in one of Pimlico's prettiest garden squares
房子位于皮姆利科最美丽的一个花园广场上。
5.She's the prettiest, most ethereal romantic heroine in the movies.
她是所有电影中最美丽、最飘逸的爱情女主角。