Как сказать по 7 ч. 15 мин., 9ч. 45 мин. 5ч.30мин., 10ч.15мин.,12ч.,2ч.30мин.,6 ч.45мин., 4ч. !

7:15= guarter past seven,9:45=guarter to ten,5:30=half past five,10:15=guarter past ten,12:00=twelve o'clock,2:30=half past two,6:45=guarter to seven,4:00= four o'clock

a quarter past seven
a quarter to ten
half past five
a quarter past ten
twelve o'clock
half past two
quarter to seven
four o'clock