(6:00) It's six o'clock.
(10:20) It's ten twenty.
(1:35) It's one thirty-five.
(12:00) It's twelve o'clock.
(12:30) It's twelve thirty. / It's half past twelve.
(8:10) It's eight ten.
(6:30) It's six thirty. / It's half past six.
(11:25) It's eleven twenty-five.
(9:15) It's nine fifteen. / It's a quarter past nine.
(6:15) It's six fifteen. / It's a quarter past six.
(4:50) It's four fifty.
(6:45) It's six forty-five. / It's a quarter to seven.
(2:40) It's two forty.
(3:45) It's three forty-five. / It's a quarter to four.
(7:05) It's seven oh five.
(3:00) It's three o'clock.
(9:00) It's nine o'clock.
(5:55) It's five fifty-five.