Should I use a gerund with a preposition or a present participle? 1) John killed Jack shooting him. 2) John killed Jack by shooting him. I'm trying to say that Jack was killed (not wounded) as the result of the shot. 3) Bob killed his horse riding it very fast. 4) Bob killed his horse by riding it very fast. It should mean that Bob's horse died because he was riding it very fast. Can somebody understand sentence 3 in the silly way: "Bob rode his horse, got crazy and shot (stabbed) the poor animal"?