You can manually chop them up and move them around. It's a LOT of work to do a full track, and often ends up sounding unnatural. I do this all the time for a word or two, but never a whole track.
Frankly, RAMI is right. If you have no sense of timing, it's gonna be a battle. Really listen to the music and try and be with the music - it will make your tracks sound WAY better in the long run.