1. Circle the correct words to make a logical sentence.
If I’m / I’ll be late, please wait for me.
If I don’t see you tomorrow, I phone / I’ll phone you tomorrow.
If there will be / is a fire, the alarm will ring.
Will you write me if I give / I’ll give you my ?
I’m / I’ll be surprised if Martin and Julia get / will get married.
I will get a good mark on the test if I study/ won’t study hard.

2. Zero conditional
Complete the zero conditional sentences with the verb in brackets. Use contractions where possible.
If you press that button, the light(come) on.
It's easier to sleep if(you / not / be) stressed.
The teacher gets angry if(we / not / work) hard.
If(I / go) on a boat, I always feel sick.
His mother gets annoyed if(he / be) late.
If(I / not / know) a word, I look in my dictionary.
They play football if(they / not / have) any homework.
If you freeze water,(it / turn) to ice.

3. First conditional
a) If you  (help) me with my homework, I  (finish) it in time to go to the cinema.
b) If it  (not/rain), the students  (practice) sport in the playground.
c) Jane  (come) home early if she  (not/be) very busy at work.
d) Our teacher  (be) pleased if we  (do) our homework.
e) If Robert  (play) football with us, we  (win) the match.

4. First vs Zero conditional
If my husband _________ (eat) too much French fries, he _________  (get) fat.
When I _________ (sell) my motorbike, I _________ (buy) a boat.
Unless ice _________ (warm) up, it _________ (not melt).
If I _________ (learn) this lesson, I _________ (pass) my exam.
Jacob _________ (pick) you up, if it _________(rains).

5. First vs Zero conditional
If John _________ (fail) his English exam, he _________ (not go) to the party.
When it _________(rain), shops _________ (sell) more umbrellas.
If Virginia _________ (be) late, George _________(get) ungry.
If my team _________(win) the championship, we _________ (celebrate).
If I _________(not clean), nobody _________ (do).

6. First vs Zero conditional
Respuestas:
eats, gets
sell, will buy
warms,  doesn’t melt
learn, will pass
will pick, rains
fails, won’t go
rains, sell
is, gets
win, will celebrate
don’t clean, does.