口大的英语怎么说

"口大"的英文表达是"talkative"。这个词的来源是由"talk"（说话）和"ative"（后缀，表示行为或状态）组成。
下面是一些使用"talkative"的英文例句及其中文翻译：
She's very talkative and always has a lot to say.
她很健谈，总是有很多话要说。
My grandma is very talkative and loves to chat with anyone who will listen.
我的奶奶很健谈，喜欢和任何愿意倾听的人聊天。
He's so talkative that it's hard to get a word in edgewise.
他太健谈了，很难插进去说话。
I'm not very talkative, but my sister is the opposite.
我不是很健谈，但我妹妹正好相反。