Student or Learner
Why do we omit the preposition "for" in the following:
We went shopping and not for shopping.
We went swimming and not for swimming.
Are there any rules to help us decide when to omit the appropriate preposition?
We do not omit 'for'. It was never there. We use 'go' followed by an -ing form when we do many activities in which we move about. We go running, hiking, camping, swimming, shopping, etc.