a. They paid a large sum for using our equipment.
b. They paid a large sum to use our equipment.
Can one tell whether we were paid before they used our equipment or after they used our equipment?
c. I paid him 100 dollars for driving around in his car for the weekend.
d. I paid him 100 dollars to drive around in his car for the weekend.
Can one tell whether the payment was made before or after the weekend in question?
The reason I have two sets of sentences is that I suspect that maybe 'use' might be a verb whose usage might be different to other verbs. That is just a suspicion, and probably a silly one.
I think the infinitive should be used when the action is supposed to take place after the payment and the 'for+gerund' construction could be used in either case, but I am not sure.
This question resembles the one I already asked, but here the agent of the infinitive or the gerund is the subject of the sentence.