1. A man was reading a newspaper on the seat of the subway train.

2. A man was reading a newspaper on the seat in the subway train.

3. A man was reading a newspaper on the seat on the subway train.

4. A man was reading a newspaper on the seat of the subway.

5. A man was reading a newspaper on the seat in the subway.

6. A man was reading a newspaper on the seat on the subway.
========================
Which expressions can we use? Would you check the sentences? Can we use both 'on' and 'in' before 'the train'?Thank you.

1 answer

I think "on the seat" and "train" are not needed.

A man was reading a newspaper on the subway.

or

On the subway, a man was reading a newspaper.