1. I start work at 8:00 am each day
2. She leaves work at about 6:00 pm
3. I can't talk to you now - I'm at work.
4. I'm an actor, but I'm out of work at the moment.
5. They go to work very early in the morning
I think it's a verb in 5 it is a verb, and it's a noun in 1, 2, 3, 4.
I'd say they are all nouns. But consider sentences like this. 6.
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I'd say they are all nouns.
But consider sentences like this.
6. They go to the office to work ,not to sleep.
7. They like to work.
Here, 'work' is a verb.
Clive