you could have gone down vs you could have go down

Some examples from the web:

• You could have gone down a dark road.
• You know, I could have gone down to the precinct and picked this up.
• You know, it could have gone down the way they said.
• Now, there's lots of reasons It could have gone down that way.
• There's no other way that this could have gone down.
• Cell tower must have gone down.
• Too many bad things have gone down here, man.
• Whatever swelling you had seems to have gone down.
• Since the networks have gone down, I haven't been able to contact them.
• Except he wouldn't have gone down as my father.
• Central locking must have gone down with the computers.
• People far more obsessed than you have gone down that road.
• The devil may have gone down to georgia, Mr. Ford, But he lives in memphis.
• So the diamond had to have gone down with the ship.
• He and some students from school have gone down to the Learning Hall.
• You must have gone down the wrong tunnel.
• 29% of edible fish have gone down by 90%.
• Almost as hot as the flames that Eagleton would have gone down in if I had not saved them.
• See, it wouldn't have gone down if you just waited a little bit and let SWAT do its job.
• But I feel compelled to tell you that other firefighters have gone down this road, only to find themselves chasing ghosts.

Some examples from the web:

• Some... somebody that saw everything go down.
• Our janitor did not go down easy.
• Problem is, if you go down, I go down.
• I understand - we all understand - that when GNI goes down, the contribution will go down, but it should not go down as a percentage of GNI and then go down again.
• So if you go down, we all go down.
• Just because she might go down doesn't mean you have to go down with her.
• Bring the cop back in, 'cause if I go down, you go down with me.
• Because if I go down, you're go down with me.
• You don't have to go down with him, Julia, but he will go down.
• If we go down, we all go down together.
• - They go down, they go down hard.
• When they go down, they go down hard.
• I was supposed to go down, land on the platform, and go down the chimney myself.
• I go down where this chair takes me down.
• Go down and tell them to go on ahead, the bride arrives last.
• To go down to wonderland, you start by going up.
• If it was midnight, that would go down an absolute storm.
• This can go down a lot of different ways.
• Maybe we should go down there and see what's afoot.
• Only one way it can go down.