Conditional Negatives — Gap Fill Practice

Negative conditionals use "not" in either the if-clause or the result clause to express what happens when something does not occur. Each conditional type forms negatives differently: zero conditional uses "don't/doesn't," first conditional uses "don't" or "won't," second conditional uses "didn't" or "wouldn't," and third conditional uses "hadn't" or "wouldn't have." Knowing where to place the negative — and how it changes the meaning — is a key grammar skill from B1 level onwards.

The position of the negative completely changes what the sentence means. Compare: "If you don't water the plants, they die" (negative in the if-clause — the plants die because of neglect) vs "If you water the plants, they don't die" (negative in the result — watering keeps them alive). In third conditional, this distinction becomes even more important: "If I hadn't left early, I would have missed the train" vs "If I had left early, I wouldn't have missed the train." This exercise practises forming negatives correctly across all conditional types, a skill frequently tested in Cambridge B2 First use of English.