Okay, the previous answers are correct, so I'll just add an example using all the words you mentioned:
Cheer up, mate. It's only 1-0 for Manchester. We have plenty of time to equalise. Come on, Arsenal! Speed up, only ten minutes left! Score a goal! Hurry up, we're running out of time! Go, van Persie, go! Yeah, come on!
Come on! is sort of like 加油！