- I would say that he is very good in the subject and that his help would be very beneficial to me.
- I would suggest that if he helps me now, I will help him another time.
- I would try to make it clear to him that he would be a bad friend if he didn't do it.
- I would ask him if he could give me a little advice, and I wouldn’t force him.
- I would ask someone else if they seemed unwilling.