1. What happens if you heat ice?
a) It melts
b) It melted
c) It will melt
d) It would melt
Answer: a) It melts
Explanation: Zero conditional uses present simple for general facts.
2. What will you do if it rains tomorrow?
a) I stay at home
b) I would stay at home
c) I stayed at home
d) I will stay at home
Answer: d) I will stay at home
Explanation: First conditional uses “will” for real future situations.
3. What would you do if you found a wallet?
a) I will return it
b) I would return it
c) I returned it
d) I return it
Answer: b) I would return it
Explanation: Second conditional for imaginary situations uses “would.”
4. What would have happened if he had missed the flight?
a) He will miss the meeting
b) He would miss the meeting
c) He would have missed the meeting
d) He missed the meeting
Answer: c) He would have missed the meeting
Explanation: Third conditional for unreal past events uses “would have.”
5. What would you do if you were the president?
a) I was the president
b) I would change the law
c) I changed the law
d) I change the law
Answer: b) I would change the law
Explanation: Second conditional imagines present or future impossibilities.
6. What happens if you don’t water plants?
a) They die
b) They died
c) They will die
d) They would die
Answer: a) They die
Explanation: Zero conditional for natural laws uses present simple.
7. How would you feel if you failed the test?
a) I feel sad
b) I felt sad
c) I will feel sad
d) I would feel sad
Answer: d) I would feel sad
Explanation: Second conditional shows hypothetical emotional reactions.
8. What would have changed if we had taken the bus?
a) We would have arrived early
b) We would arrive early
c) We arrive early
d) We will arrive early
Answer: a) We would have arrived early
Explanation: Third conditional uses “would have” + past participle.
9. When will you call if you finish work early?
a) I would call
b) I called
c) I call
d) I will call
Answer: d) I will call
Explanation: First conditional for future actions uses “will.”
10. What will happen if you touch fire?
a) You would get burned
b) You get burned
c) You will get burned
d) You got burned
Answer: c) You will get burned
Explanation: First conditional expresses future certainty.