The dog can't throw up. The dog couldn't throw up. yes The dog cannot throw up. The dog could throw up. no The dog is not able to throw up. The dog isn't throwing up. yes The dog won't be able to throw up. The dog will throw up. no The dog cannot have thrown up. The dog might not have thrown up. yes The dog couldn't throw up. The dog must have thrown up. no The dog can throw up. The dog couldn't throw up. no The dog may throw up. The dog could throw up. yes The dog might throw up. The dog isn't throwing up. no Maybe the dog will throw up. The dog will throw up. no The dog could have thrown up. The dog might not have thrown up. no Perhaps the dog threw up. The dog must have thrown up. no The dog threw up. The dog might throw up. yes