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| ✅ Correct | ❌ Wrong |
|---|---|
| If it rains, we will stay home. | If it will rain, we will stay home. |
Written by the Olly English team · How we build our tests
Keep practising with related reading and grammar units at your level.
All B1 questions for “First Conditional – B1 Grammar Exercises with Answers”, each with the correct answer and a short explanation. Try the interactive exercises above, then check your answers here.
1. If she ___ the bus, she will be late for work.
Answer: misses
The if-clause always uses the present simple, misses, even though the meaning is future.
2. If you send the email today, I ___ it tomorrow morning.
Answer: will read
The result clause needs will plus the base verb for a likely future outcome.
3. If they do not book early, the tickets ___ very expensive.
Answer: will be
Will be states the likely result of the condition; are alone just states a fact.
4. If the weather stays clear, the flight ___ on time.
Answer: will leave
The result clause takes will plus the base verb for the probable outcome.
5. If the shop ___ open late, we will buy the tickets tonight.
Answer: stays
The if-clause needs the present simple, stays, never will, even though the time is future.
6. If we leave now, we ___ the beginning of the film.
Answer: will see
The result clause uses will see, the normal form for a likely future result.
7. If he does not apologise, she ___ him.
Answer: will not forgive
Will not forgive gives the likely negative result; would not forgive suits an unreal situation instead.
8. ___ you finish the project if the client sends the files today?
Answer: Will
A first conditional question about the result starts with will before the subject.
9. If it rains tomorrow, the match ___ cancelled.
Answer: will be
Will be states the probable result of a real future condition; is alone sounds too certain.
10. If she studies every day, she ___ real progress by June.
Answer: will make
Will make is the result clause form for a realistic future outcome, not makes alone.
1. if / it / rains / we / will / stay / home
Answer: If it rains, we will stay home.
Will never goes in the if-clause; it belongs only with stay home, the result.
2. if / you / study / hard / you / will / pass
Answer: If you study hard, you will pass.
The if-clause keeps the base form, study; will pass is the separate result clause.
3. she / will / call / if / she / has / time
Answer: She will call if she has time.
Here the result clause comes first; has, not will have, still marks the condition.
4. if / they / do / not / hurry / they / will / miss / the / train
Answer: If they do not hurry, they will miss the train.
Do not hurry is the negative present simple condition; will miss states the likely result.
5. will / we / arrive / late / if / the / train / is / delayed
Answer: Will we arrive late if the train is delayed?
A first conditional question starts with will before the subject, then the base verb.
1. Which option does not belong?
Answer: If it will rain, we will get wet.
Will never appears in the if-clause; the correct form is If it rains, we will get wet.
2. Which option does not belong?
Answer: If she will finish early, she will help you.
The if-clause needs the present simple, finishes, not will finish; will belongs only to the result.
3. Which option does not belong?
1. Mount Everest rises to 8,849 metres, and expert guides lead climbers toward its summit every spring. If the weather _____ (turn) bad, the guides will stop the climb at once.
Answer: turns
The if-clause takes the present simple turns, even though the weather change is still in the future.
2. Every climber must listen carefully to instructions. If a storm arrives suddenly, the guides _____ an immediate return to base camp.
Answer: will order
This is the result clause, so it needs will plus the base verb. Plain order would lose the future meaning.
3. Altitude affects people in very different ways. If a climber _____ not feel well, the guide will turn back with them.
Answer: does
A negative if-clause uses does not, never will not. Will belongs only in the result clause.
4. Fresh snow can hide deep cracks in the ice. If the guide sees a dangerous crack, the whole group _____ (change) direction together.
Answer: will change
1. It rains tomorrow. We will cancel the picnic.
Answer: If it rains tomorrow, we will cancel the picnic., If it rains tomorrow, we will cancel the picnic
Turn the first idea into the if-clause with present simple, then add will to the result.
2. She misses the deadline. Her manager will not be pleased.
Answer: If she misses the deadline, her manager will not be pleased., If she misses the deadline, her manager will not be pleased
Misses stays present simple in the if-clause; will not be pleased is the negative result.
3. You do not book early. The tickets will sell out.
Answer: If you do not book early, the tickets will sell out., If you do not book early, the tickets will sell out
Keep the negative present simple, do not book, in the if-clause before adding will sell out.
4. The team trains hard this week. They will win the match.
Answer: If the team trains hard this week, they will win the match., If the team trains hard this week, they will win the match
Trains stays present simple for the condition, and will win names the likely result.
5. He does not apologise. She will not speak to him.
Answer:
6. if / the / weather / improves / we / will / go / hiking
Answer: If the weather improves, we will go hiking.
Improves is present simple for the condition; will go is the future result.
7. if / he / apologises / she / will / forgive / him
Answer: If he apologises, she will forgive him.
The condition uses apologises, not will apologise; the result alone carries will.
8. you / will / feel / better / if / you / rest
Answer: You will feel better if you rest.
Rest, present simple, states the condition; will feel gives the probable result.
9. if / prices / rise / again / customers / will / complain
Answer: If prices rise again, customers will complain.
Rise is the present simple condition; will complain is the likely future result.
10. if / she / misses / the / deadline / the / manager / will / not / be / happy
Answer: If she misses the deadline, the manager will not be happy.
Misses keeps the present simple in the if-clause; will not be marks the negative result.
Answer: If it rains, we would stay home.
Would belongs to the second conditional, for unreal situations; a real future condition needs will.
4. Which option does not belong?
Answer: If you finish the report, you send it today.
The result clause needs will send, not send alone, or the sentence loses its future meaning.
5. Which option does not belong?
Answer: If she will not answer, I will call again later.
The negative if-clause is does not answer, never will not answer; will stays in the result only.
6. Which option does not belong?
Answer: If it snows tonight, the roads will closed.
Will always pairs with the base verb, close, never the past form closed.
7. Which option does not belong?
Answer: If it won't rain, we will go for a walk.
Won't means will not; the if-clause needs doesn't rain, not won't rain, since will never belongs there.
8. Which option does not belong?
Answer: If the price is right, we would buy it.
This is a real, likely condition, so it needs will buy, not would buy.
9. Which option does not belong?
Answer: If you will send the file, I will print it.
The if-clause takes send, present simple, never will send; will belongs to the result alone.
10. Which option does not belong?
Answer: If it rains tomorrow, the match cancel.
The result needs will be cancelled or will cancel; a bare present verb cannot show the future.
The result clause states what happens next, so it takes will plus the base verb change.
5. Oxygen grows thin above 8,000 metres. If a climber _____ signs of confusion, the guide will check the oxygen supply.
Answer: shows
Shows keeps the present simple in the if-clause. Will show is the most common error at this level.
6. Radios connect every team on the mountain. If the teams _____ not report in, base camp will send help immediately.
Answer: do
The plural subject teams takes do not. The auxiliary is never will inside an if-clause.
7. Every guide carries a full medical kit. If someone _____ (get) hurt on the climb, the team will give first aid at once.
Answer: gets
Gets hurt is the present simple condition. A possible future accident still uses this form.
8. Nobody is ever left behind near the summit. If one climber cannot continue, the rest of the group _____ together at a safe point.
Answer: will wait
The result clause needs will wait. Waits alone reads as a habit rather than a future response.
9. Weather can change within minutes at that height. If visibility _____ not improve, no guide will allow the group to climb higher.
Answer: does
Visibility is singular, so the negative if-clause takes does not improve, never will not improve.
10. Each season brings new climbers and new risks. If the guides keep following these clear rules, more climbers _____ (reach) the top safely in the years ahead.
Answer: will reach
Will reach gives the hopeful result of meeting the condition across the seasons ahead.
The negative if-clause uses does not apologise, and will not speak gives the result.
6. We leave before six. We will avoid the traffic.
Answer: If we leave before six, we will avoid the traffic., If we leave before six, we will avoid the traffic
Leave stays present simple after if, and will avoid states the likely benefit.
7. Prices keep rising. Fewer people will shop here.
Answer: If prices keep rising, fewer people will shop here., If prices keep rising, fewer people will shop here
Keep rising is present simple for the condition; will shop names the future result.
8. You do not save the file. You will lose your work.
Answer: If you do not save the file, you will lose your work., If you do not save the file, you will lose your work
The negative present simple, do not save, becomes the if-clause; will lose is the result.
9. The flight is delayed. We will miss the connection.
Answer: If the flight is delayed, we will miss the connection., If the flight is delayed, we will miss the connection
Is delayed stays present simple in the if-clause; will miss states the likely outcome.
10. She finishes the course. She will apply for the job.
Answer: If she finishes the course, she will apply for the job., If she finishes the course, she will apply for the job
Finishes is the present simple condition; will apply is the result clause with will.
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