It's already nine o'clock.
Banks open at nine o'clock.
He said, "It's nine o'clock.
The history class starts at nine.
He works from nine to five-thirty.
I will finish my homework by nine.
I'm tired of working a nine-to-five job.
It's a quarter after nine in the morning.
He caught the nine-o'clock shuttle to New York.
I gave her my word I would be back home by nine.
I make it a rule not to watch television after nine o'clock.