it's someone's turn
君が読む番だよ。
It's your turn to read.
君が払う番だよ。
It's your turn to pay.
トムが話す番だよ。
It’s Tom’s turn to speak.
君が話す番だよ。
It's your turn to speak.
彼の番だよね？
It's his turn, right?
もう、僕がトイレ使う番だよ。
It’s my turn to use the bathroom now.
君が質問に答える番だよ。
It’s your turn to answer the question.
君がランチをおごる番だよ。
It's your turn to buy lunch.