Как п как пишется по- 815 915 950 11: 50 1: 05 2: 20 времени словами

8.15- It's  a quarter past eight 
9.15.- It's a quarter past nine
9.50- It's ten to ten
11.50- It's ten to twelve
1.05- It's five past one
2.20- It's twenty past two