谁知道I don't have a gun有何意?

谁知道I don't have a gun有何意? i don't have a i don't have it 和 i haven't it 有何区别? I don`t have a car.与I don have any cars有何不同? you don't drive a nail with a glue gun 英语 我有枪是I have gun,还是i have a gun I don't have a soccer ball. I don't have a web I don't even have a I don\'t have I don't have I have a pen ,haven't I 还是I have a pen ,don't I