谓语是个短语动词 boast about：夸耀,吹嘘
boast about 后可接名词,代词,也可以接宾语从句
1.Paul likes to boast about his achievements.
（保罗喜欢吹嘘他的成就.）
2.I will boast about a man like that,but I will not boast about myself,except about my weaknesses.
为这人,我要夸口.但是为我自己,除了我的软弱以外,我并不夸口.
3.American girls like boys who boast about how cool they are.
美国女孩喜欢男孩谈论他们自己是多么多么的酷.