Use Unless Grammar Exercises: Level B1-B2 (with Answers)

⏱ Time: 07:30 📝 Questions: 15 📊 Level: B1, B2 📚 Type: Grammar ⭐ XP: up to +16 (on pass)

How well do you really know Use Unless? Find out with 15 exercises designed for B1-B2 learners. Instant scoring shows exactly where you stand, and detailed explanations turn every mistake into a learning moment. Retake any time to measure your improvement.

⏱ You have 07:30 to answer 15 questions. The timer only starts when you click Begin.

Q1  15
Q1 15

Question 1: You will miss the flight ___ you leave for the airport right now.

Question 1 options
'unless' is correct because it means 'if not' and introduces a negative condition in a first conditional sentence. 'although' expresses contrast, 'because' expresses reason, and 'since' expresses either reason or time — none of these replace 'if not'.
Q2 15

Question 2: Unless the manager ___ the report by Friday, the project will be delayed.

Question 2 options
'submits' is correct because after 'unless', we use a present tense (not 'will submit') to refer to a future condition. Using 'will submit' in the unless-clause is a common error. 'submitted' is past tense and doesn't fit the future context. 'submitting' is not a finite verb and cannot stand alone here.
Q3 15

Question 3: 'Unless' can be used to replace 'if not' in all types of conditional sentences, including questions.

Question 3 options
False because 'unless' cannot be used in questions. For example, 'What will you do if you don't pass?' is correct, but 'What will you do unless you pass?' is not standard English usage.
Q4 15

Question 4: What is 'unless' expressing in this sentence: 'You can't borrow my car unless you have a valid driving licence'?

Question 4 options
'unless' here states a restriction — it sets the one condition that must be met for borrowing the car. It is not expressing contrast between two events, a sequence of actions, or a reason why something happened.
Q5 15

Question 5: Arrange the words to make a correct sentence:

Question 5 options
  • it stops raining,
  • Unless
  • the outdoor event
  • we will cancel

Drag items or use arrows to arrange them in the correct order.

The correct order is 'Unless it stops raining, we will cancel the outdoor event' because 'unless' introduces the condition clause, which is followed by a comma, and the main clause uses 'will' for the future result.
Q6 15

Question 6: Which sentence correctly uses 'unless'?

Question 6 options
'Unless you practise every day, you won't improve' is correct because 'unless' is followed by a present tense in the condition clause and 'will' in the main clause. Using 'will' after 'unless' is incorrect. 'Unless' cannot be used in direct questions. 'Unless' should not be combined with a negative verb ('don't') as this creates a double negative.
Q7 15

Question 7: Customer: 'Can I get a refund?' Shop assistant: '___ you have your receipt with you, I'm afraid I can't process a refund.'

Question 7 options
'Unless' is correct because the shop assistant is stating a condition — a receipt is required for the refund. 'Although' would express contrast, 'because' would give a reason, and 'when' would suggest the refund happens automatically with a receipt, which is the opposite meaning.
Q8 15

Question 8: Which sentence correctly uses 'unless' rather than 'if not'?

Question 8 options
'Unless you study, you will fail the exam' correctly replaces 'If you don't study, you will fail the exam.' The other options misuse 'unless': combining it with 'not' creates a double negative, using 'will' in the unless-clause is grammatically incorrect, and 'unless' cannot replace 'if' in a positive conditional without changing the meaning.
Q9 15

Question 9: Put the words/clauses in the correct order:

Question 9 options
  • unless
  • I had lost
  • I wouldn't have missed the deadline
  • my notes

Drag items or use arrows to arrange them in the correct order.

The correct order is 'I wouldn't have missed the deadline unless I had lost my notes' because 'unless' with a past perfect in the condition clause pairs with 'would have' in the main clause to form a third conditional structure.
Q10 15

Question 10: Unless the temperature ___ below zero tonight, the roads should be safe to drive on.

Question 10 options
'drops' is correct because the unless-clause requires a present simple tense to refer to a future condition, not 'will drop'. 'dropped' is past tense and does not fit. 'is dropping' (present continuous) does not naturally describe a future condition in an unless-clause.
Q11 15

Question 11: Which statement about using 'unless' in English is true?

Question 11 options
'Unless' is followed by a present tense (not 'will') in the condition clause when referring to future events, just like 'if'. It cannot be used in questions and should not be combined with a negative verb as this produces a double negative. It is not interchangeable with 'if' in all sentences because it always carries the meaning 'if not'.
Q12 15

Question 12: Rewrite using 'unless': 'If he doesn't apologise, she won't speak to him.' → She won't speak to him ___.

Question 12 options
'unless he apologises' is correct because 'unless' replaces 'if not', so the verb after 'unless' must be positive (present simple). 'unless he doesn't apologise' creates a double negative. 'unless he will apologise' incorrectly uses 'will' in the unless-clause. 'unless he apologised' uses the wrong tense for a first conditional.
Q13 15

Question 13: Match each sentence to the correct grammar label.

Question 13 options
Unless she studies harder, she will fail the exam.
I wouldn't have been ill unless I had stood in the rain.
He wouldn't quit unless he found a better job.
You can't use the gym unless you are a member.
Third conditional – past perfect in unless-clause with 'would have'
Present restriction – states a general rule or condition
First conditional – future result with present tense in unless-clause
Second conditional – past tense in unless-clause with 'would'

Select an item on the left, then tap its match on the right.

'Unless' can follow a present tense (first conditional / future), past tense (second conditional), or past perfect tense (third conditional), and it can also express a general restriction in the present.
Q14 15

Question 14: It is correct to say 'Unless you don't bring your ID, you can't enter' to mean 'You need your ID to enter'.

Question 14 options
False because combining 'unless' with a negative verb ('don't') creates a double negative, which reverses the intended meaning. The correct form is 'Unless you bring your ID, you can't enter', where the verb after 'unless' stays positive.
Q15 15

Question 15: A manager wants to warn an employee that the project will fail if a specific condition is not met. Which sentence best expresses this?

Question 15 options
'Unless the team meets the deadline, the project will fail' is the most precise choice because 'unless' directly states the one condition preventing failure, making the warning clear. 'Although' expresses contrast, 'if' without 'not' states a positive condition (meaning the project fails when the deadline IS met), and 'because' gives a reason rather than a conditional warning.