at seven oclock fifteen minutes

at seven oclock forty-five minutes

at eight oclock thirty minutes

at nine oclock

at ten oclock forty-five minutes

at eleven oclock forty minutes

at twelve oclock ten minutes

at twelve oclock fifti minutes

7:15- It is  fifteen minutes past seven. It is a quarter past seven

7:45 - It is  fifteen minutes to eight. It is a quarter to eight

8:30 - It is half past eight

9:00- It is nine o* clock sharp

10:45- It is  fifteen minutes to eleven. It is a quarter to eleven

11:40- It is  twenty minutes to twelve. 

12:10- It is  ten minutes past twelve

12:50- It is  ten minutes to one.