be a braggart
braggart 是可数名词，作表语时单数前要加冠词 a。
My uncle is a braggart who talks about his golf scores all day.
我叔叔是个吹牛大王，整天谈论自己的高尔夫球成绩。
不断吹嘘或夸耀的人；一个非常自夸和爱说话的人
不断吹嘘或夸耀的人
Someone who constantly brags or boasts.
一个非常自夸和爱说话的人
a very boastful and talkative person
He is such a braggart that nobody wants to listen to his stories.
他是个非常自夸的人，没人想听他的故事。
用法提示：名词braggart作表语，描述一种自夸的性格。
The office braggart always exaggerates his achievements.
办公室的那个吹牛大王总是夸大自己的成就。
用法提示：名词braggart作主语，指具体的人。
Braggarts often feel insecure deep down.
自夸者内心深处常常感到不安。
用法提示：复数形式braggarts作主语，泛指一类人。
braggart 是可数名词，作表语时单数前要加冠词 a。
My uncle is a braggart who talks about his golf scores all day.
我叔叔是个吹牛大王，整天谈论自己的高尔夫球成绩。
a bit of a 用来缓和语气，表示“有点爱吹牛”。
She's a bit of a braggart, but she really did write that song.
她有点爱吹牛，但那首歌确实是她写的。
call 后接宾语和名词补语，补语前的冠词不能省略。
His classmates called him a braggart after he exaggerated his test score.
他夸大自己的考试成绩后，同学们称他为吹牛大王。
such a 后接可数名词单数，起强调作用。
I have never met such a braggart in my life.
我这辈子从没见过这么爱吹牛的人。
grammar · medium
易错句子He is braggart.
正确表达He is a braggart.
braggart 是单数可数名词，作表语时前面必须加不定冠词 a。汉语名词本身没有冠词系统，把“他是吹牛的人”直译成 He is braggart 就漏掉了冠词；补上 a 才符合英语单数可数名词的规则。
grammar · medium
易错句子He always braggarts about his new car.
正确表达He always brags about his new car.
braggart 只有名词词性，不能作谓语；表示“吹嘘”这个动作要用动词 brag，主语为第三人称单数时用 brags。汉语“他总吹牛”里的“吹牛”可以直接作动词，学习者便误把名词 braggart 也当动词并加上 -s。
grammar · medium
易错句子He is a braggart man who talks about himself all day.
正确表达He is a boastful man who talks about himself all day.
braggart 只能作名词，不能像形容词那样放在另一名词前作定语；表示“爱自夸的”要用形容词 boastful。汉语“吹牛的人”中“吹牛”可以充当定语，于是容易被误当成形容词直接修饰 man。
bragger 是 brag 加 -er 的口语说法，语气随意，多用于日常口语；braggart 是固定的书面名词，贬义更重，常用来刻画爱吹嘘的人物性格。
show-off 侧重当众炫耀以博取注意，炫耀的可以是财物、技能或外貌；braggart 专指言语上反复自夸、吹嘘自己的人。
egotist 指凡事以自我为中心、话题总绕着自己转的人；braggart 专指反复吹嘘自身优点或成就的人，不一定自私自利。
brag（基础动词）
brag + -er（名词）
brag + -ing（名词）
brag + -y（形容词，非正式）
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