boast、brag、crow与pride这些动词均含有“自夸、吹嘘”之意。
boast : 普通用词，常意味着在谈论自己的成就、财产或能力时过于骄傲、自我满足和赞扬自己，从而使其他人感到恼怒或冒犯。
- They boasted that they had never lost a single game.
他们夸口说从来没有输过一场比赛。 - He didn't talk about his exam results in case people thought he was boasting.
他没有谈论自己的考试成绩，以免让别人以为他在自我吹嘘。
（拓展学习：熟词僻义 | boast 并不完全是“吹嘘”）
brag : 非正式用词，其夸耀和吹嘘意味强于boast，到了过分夸大，有时令人讨厌的地步。
- She's always bragging about how much money she earns.
她老是吹嘘自己挣钱如何如何多。 - They bragged that their team had never been beaten.
他们夸耀说他们队从未输过。
crow : 多指大声吵嚷地吹嘘，夸耀自己做某事比他人做得好。
- He's always crowing about his latest triumph.
他老是吹嘘他最近取得的成功。
pride与boast的意义较接近，指炫耀、夸口，自鸣得意，常与反身代词连用。
- She had always prided herself on her appearance.
她总是对自己的外貌感到得意。 - Smith prides himself on being able to organise his own life.
史密斯对能够把自己的生活安排得井井有条感到很得意。
