clauses II

[Anonymous]

Which is correct:
1-John when in his office is a nice man; but John when driving, is unbearable.
2-John, when in his office, is a nice man; but John, when driving, is unbearable.

[Anonymous]

John is a nice man when he is in the office, but he is unbearable when he is driving.

Keep it simple.

[Anonymous]

Thanks for your replies.
Actually, I always say and write what you have written. But I was trying to figure out how postmodification could be used in cases like this. Would you say my sentences are grammatically wrong?

[Pete]

Thanks for your replies.
Actually, I always say and write what you have written. But I was trying to figure out how postmodification could be used in cases like this. Would you say my sentences are grammatically wrong?

Your original sentences were:
Which is correct:
1-John when in his office is a nice man; but John when driving, is unbearable.
2-John, when in his office, is a nice man; but John, when driving, is unbearable.
Yes, you can use post modification to say the same thing. I think you need to use your sentence 2; separating the modifier with commas seems necessary.