1) If Neil wouldn't grab the oar, he probably wouldn't have survived.
2) If you would do more exercise, you would feel better.
3) 3 If the river would be narrower, Blake would have been able to cross it.
4) if it stopped raining, we would go for a walk.
5) If I were you, I wouldn't go hiking in such bad weather.
6) If Neil and Blake hadn't slept by a fire, they would die of cold.