Which one is correct?
1.I just took an herb to treat my stomachache.
2.I just took an herb for treating my stomachache.
3. I just took an herb for treatment of my stomache.

Which one is correct?And is it possible to tell me when should I use to do, and when should I use for doing sth---I always treat them the same.

Thank you very much!!!!

Question

Which one is correct?
1.I just took an herb to treat my stomachache.
2.I just took an herb for treating my stomachache.
3. I just took an herb for treatment of my stomache.

Which one is correct?And is it possible to tell me when should I use to do, and when should I use for doing sth---I always treat them the same.

Thank you very much!!!!

Answer

1. I just took an herb to treat my stomachache.

"To do" is similar to "for doing" but they are not identical. There are no clear rules that I can think of, though! That's ambiguous English grammar for you.