だい (B. 90)

Example sentences

(ksa). 
どこが静かだい
What place is quiet?
(ksb). 
誰が行くんだい
Who is going?
(a). 
新しい仕事はどうだい
How's your new job
(b). 
あの人は誰だい
Who is that person?
(c). 
何が可笑しいんだい
What's funny?
(d). 
どの人は佐藤先生なんだい
Which person is Professor Sato?

Formation

(1) {Adjective な stem/ N} だい  
  静かだい Something is quiet?
  先生だい Someone is a teacher?
(2) {V/Adjective い} informal んだい  
  {話す/話した} んだい Someone talks/talked?
  {高い/高かった} んだい Something is/was expensive?
(3) {Adjective な stem/ N} {/だった} んだい  
  {静か/ 静かだった} んだい Something is/was quiet?
  {先生/先生だった} んだい Someone is/was a teacher?