We should point out that you can have more than one circumstance in a sentence, and they’re not always separated by a comma.
Here’s another snippet that uses both place and time, and only one of those is separated by a comma.
Outside, there is usually a little breeze after the sun drops down over the edge of the world and the stars come out.
Let’s do a couple of variations using more complex descriptions of circumstances.
Downstairs, there is usually a lot of noise after Mum and Dad settle onto the sofa and start watching TV.
Outside, the trees in our garden whisper after the sun disappears and the world is full of shadows.
In the canteen, they stopped selling hot chips after seagulls started flying in through the window and attacking the cooks.
