... だい
Who, what, why
JLPT
N2
Istruktura
Interrogative word + だい
Ibig sabihin
Followed by a question word to pose a question to the listener. This is a somewhat old-fashioned way of speaking, used only in spoken language and often by older men.
彼誰
だい
。
Who is he?
いつ
行
くだい
。
When are you going?
どうだい
。
What do you think?
