Meaning & usage
だい turns a sentence into a casual question, replacing か. It attaches directly to the plain form, including だ after nouns and na-adjectives, as in 何時だい or どうだい. The examples show a friendly, informal tone, often used by men in relaxed conversation.
Example sentences 8
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よろしい、でもお金はどうなるんだい。
Well, but what about the money?
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なんだい、話したいことって。
What do you want to talk to me about?
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「コーヒーでもどうだい」「できればそうしたいのだが、いくところがあるのでね」
"How about a cup of coffee?" "I'd like to, but I have a previous engagement."
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それはそうと、今何時だい？
What time is it, anyway?
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ずっと何をしていたんだい。
What have you been doing?
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どうしたんだい、マイク。
What's up, Mike?
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いったい、なんなんだい。
What on earth is it?
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「何かがおかしい」「なんでそんなこと言うんだい？」
"Something is off." "Why would you say something like that?"