It's (a) quarter to eleven.
It's ten to two.
It's twenty past eight.
It's eleven past eleven.
It's half past three.
It's four o'clock.
It's (a) quarter past nine.
It's two o'clock.
It's (a) quarter to six.
It's five to twelve.
It's half past seven.
It's half past two.
It's twenty-two to one.