The key to exercise solutions in chapter 4b - Grammar for the textbook Spark 4 - Student's Book with authors Virginia Evans, Jenny Dooley from Express Publishing
Question
Write sentences using the correct conditional.
We can't go out. It's snowing.
They got lost. James brought the wrong map.
You can't eat these mushrooms. They are poisonous.
They ran out of petrol. Tom forgot to fill the tank.
I can't call anyone. I don't have a phone.
Don't approach an alligator. It attacks.
We don't have a guide. We can't go into the forest.
She managed to survive. She had two bottles of water.
Answer
If it wasn't/weren't snowing, we could go out.
If James hadn't brought the wrong map, they wouldn't have got lost.
If these mushrooms aren't posionous, you could eat them.
If Tom hadn't forgotten to fill the tank, we wouldn't have run out of petrol.
If I had a phone, I would call someone.
If you approach an alligator, it will attack.
If we had a guide, we would go into the forest.
If she hadn't had two bottles of water, she wouldn't have managed to survive.