Zero and First Conditionals

CEFR A2–B1
Grammar
Printable
Answer key

Zero and First Conditionals is a printable grammar worksheet for English language learners at CEFR level A2–B1. It covers if + present simple; if + present simple + will, with 5 exercises and an answer key.

We use the zero conditional for facts and things that are always true: If you heat water to 100°C, it boils.

We use the first conditional for real and possible future situations: If it rains tomorrow, I will stay at home.

In both conditionals, the 'if' clause can come first or second; use a comma after the 'if' clause when it comes first.

Examples

If you don't water plants, they die.
Water freezes if the temperature drops below 0°C.
If I finish work early, I will call you.
She will be upset if you forget her birthday.
If they miss the train, they will take a taxi.
What will you do if you don't get the job?
If he eats too much sugar, he gets a headache.
I will lend you the money if you really need it.

What's in this worksheet

Zero or first?
Correct the mistake
Complete the conditional
Real conditions in your life
Match and join

Common mistakes

If it will rain tomorrow, we will cancel the match. → If it rains tomorrow, we will cancel the match. Never use 'will' in the if-clause of a conditional.
If you heat ice, it melted. → If you heat ice, it melts. In the zero conditional, both verbs use the present simple.
She passes the exam if she will study. → She will pass the exam if she studies. First conditional: will goes in the result clause, present simple in the if-clause.
If I am tired, I will to sleep early. → If I am tired, I will sleep early. After 'will', use the bare infinitive — not 'to + infinitive'.

Speaking prompts

What will you do if it rains this weekend? Give two or three ideas.
What happens to you if you don't have your morning coffee or tea? (zero conditional)
If you could choose any country to visit next year, where will you go and why?
What will happen if people don't reduce their use of plastic?