She used to be a teacher, but now she works in publishing.
I may eat something later, but I'm not hungry now.
Many people now own a video recorder.
She's been a vegetarian for ten years now.
Now isn't a good time to speak to him.
I thought you'd have finished by now.
You should have mentioned it before now.
That's all for now (= until a future point in time).
Etc.