You did penpal for a long time!
Is this sentence correct?
If it's not, why is it wrong?

Thank you in advance :)

Question

You did penpal for a long time!
Is this sentence correct?
If it's not, why is it wrong?

Thank you in advance :)

Answer

It's wrong. Why? A 'pal' is a friend. 'Penpal' is a person, not an activity. You can't say 'I did friend', can you? So you can't say 'I did penpal'. It makes no sense.

You can say 'I had a penpal' or 'I wrote to a penpal'.

Answer

It sounds a bit odd,maybe rephrase it to : You had a penpal for such a long time.