Are these sentences correct:
[color=red]1-John, at the office, is a friendly fellow; but in his car, he becomes very aggressive.
Meaning: John, when he is at the office, is a friendly fellow. But in his car, he becomes very aggressive.
[color=indigo]2-Jeff, at school, is very well-behaved, but at home, he is pretty noisy and cheeky.
Gratefully,
Navi.