Upper-intermediate grammar exercise: zero, first, second and third conditionals

English grammar practice exercise, upper-intermediate / advanced level.

In this exercise you will practise the zero, first, second and third conditionals.

Instructions: Decide which conditional is best for the following sentences and put the words in brackets into the correct form.



questions go herescore goes here



Structure of zero conditional
positive negative question
If/when you heat water to 100 degrees, it boils. If/when you don't heat water to 100 degrees, it doesn't boil. What happens if/when you heat water to 100 degrees?

Structure of the first conditional
positive negative question
If I see him, I'll (I will) tell him. If you don't hurry, you'll (you will) miss the bus. What will you do if there is a problem?





Structure of second conditional
positive negative question
If I had more time, I'd (I would) travel more. I wouldn't (would not) refuse if you offered me $10,000. What would you say if you met Queen Elizabeth?

Structure of third conditional
positive negative question
If I'd (I had) known you were coming, I would have waited for you. If she hadn't (had not) been ill, she would have gone to the cinema. Would you have told me if you'd (you had) known about it?