When you are describing someone's appearance, you generally use pretty and beautiful to describe women, girls, and babies. Beautiful is a much stronger word than pretty. The equivalent word for a man is handsome. Good-looking and attractive can be used to describe people of either sex. Pretty can also be used to modify adjectives and adverbs but is less strong than very. In this sense, pretty is informal.

当描述人的外貌时，通常用 pretty 和 beautiful 来描述妇女、女孩和婴儿。beautiful 比 pretty 语气强烈很多。描写男性的对应词是 handsome。good-looking 和 attractive 可用来描述两性。pretty也可以用来修饰形容词和副词，但是语气不如 very 强烈。表示这个意义时，pretty为非正式用语。