boast of/about的用法和樣例：
例句
- Untidy work is nothing to brag about.
不整潔的作業沒有什么值得自夸的。 - She was pardonably proud of her excellent sewing.
她自夸縫紉技術高超，這是情有可原的。 - He made a display of his learning.
他夸耀自己有學問。 - He boasted about the big fish he had caught.
他夸耀釣到的那條大魚。 - He is the braggest of all pedlars.
他是所有小販中最會吹牛的。 - He used to brag that he would make lots of money.
他經常吹牛說自己會賺很多很多錢。
