C1 English Grammar Test

This C1 English grammar test reviews advanced structures through 20 practice questions. It can reveal patterns that need more work, but it is not an official exam or a complete CEFR assessment. Full proficiency also involves reading, listening, speaking, writing, vocabulary, and communication in context.

In this guide, you’ll learn what the C1 English Grammar Test is, how to prepare effectively, and get 20 multiple-choice practice questions to test your skills.

What Is the C1 English Grammar Test?

The C1 level in the Common European Framework of Reference for Languages (CEFR) indicates advanced English proficiency. If you’re at this level, you can:

Understand complex grammar structures and use them fluently.
Express ideas clearly and effectively in both written and spoken English.
Handle academic and professional English with confidence.

Who Needs the C1 Grammar Test?

If you are:
Preparing for Cambridge C1 Advanced (CAE)
Taking the IELTS (7.0+ band) or TOEFL iBT (5–5.5 on the scale used from 21 January 2026)
Applying for a job or university in an English-speaking country
Improving your grammar accuracy and fluency

Use the test as focused practice, then confirm your progress with extended tasks and the current requirements of any exam, university, or employer that matters to you.

How to Prepare for the C1 English Grammar Test

1⃣ Master Key Grammar Topics

At the C1 level, grammar is about fluency, accuracy, and complexity. You should focus on:

Conditionals & Mixed Conditionals (If she had studied, she would be fluent by now.)
Perfect Tenses (She had already left before he arrived.)
Modal Verbs (He must have forgotten the meeting.)
Passive Voice in Different Tenses (The book has been read by millions.)
Inversion & Emphasis (Rarely have I seen such dedication.)
Relative Clauses (The man who lives next door is a doctor.)
Phrasal Verbs & Prepositions (She is keen on learning new things.)

2⃣ Improve Your Reading & Writing Skills

• Read newspapers, academic articles, and novels to observe complex grammar in context.
• Write essays, reports, and summaries, using a variety of sentence structures.

3⃣ Practice Listening & Speaking

• Listen to podcasts, news, and TED Talks to hear advanced grammar in use.
• Speak with native speakers or practice advanced conversation topics.

4⃣ Take Practice Tests

• Solve mock tests regularly to identify weak areas.
• Review detailed explanations for each mistake.

C1 English Grammar Practice Test (20 Multiple-Choice Questions)

Conditionals & Verb Tenses

1. If I ______ more time, I would travel around the world.

a) have
b) had
c) will have
d) has

2. By next year, she ______ in this company for a decade.

a) will work
b) has worked
c) will have worked
d) is working

3. Use the third conditional: If he ______ harder, he would have passed the exam.

a) studies
b) studied
c) had studied
d) was studying

4. I wish I ______ more languages when I was younger.

a) learned
b) had learned
c) have learned
d) learn

Modal Verbs & Passive Voice

5. The documents ______ yesterday, but I haven’t received them yet.

a) should have been sent
b) should be sending
c) should send
d) should have sent

6. Choose a strong negative deduction: She ______ be at home because her car is not outside.

a) mustn’t
b) can’t
c) shouldn’t
d) wouldn’t

7. Choose a strong positive deduction: You ______ be exhausted after working all night.

a) must
b) may
c) could
d) can

8. Use the past perfect continuous for rain leading up to the decision: The match was postponed because it ______ heavily.

a) rained
b) was raining
c) had been raining
d) rains

Inversion & Word Order

9. Use past simple inversion: Not until later ______ how serious the situation was.

a) I realized
b) did I realize
c) I have realized
d) had I realized

10. Only after she had left ______ what she meant.

a) I understood
b) did I understand
c) I had understood
d) do I understand

Relative Clauses & Prepositions

11. The novel, ______ was written in the 19th century, is still popular today.

a) that
b) who
c) which
d) where

12. He’s really good ______ solving difficult problems.

a) on
b) at
c) in
d) of

13. She’s looking forward ______ on her holiday next month.

a) to go
b) going
c) to going
d) go

Phrasal Verbs & Collocations

14. I was so tired that I ______ in the middle of the meeting.

a) dropped out
b) dropped off
c) dropped in
d) dropped down

15. I couldn’t ______ what he was saying because of the noise.

a) take in
b) take up
c) take over
d) take out

16. She ran so fast that she ______ her competitors easily.

a) left behind
b) left out
c) left over
d) left in

Error Correction and Specified Transformations

17. I wish I know the answer.

a) knows
b) will know
c) knew
d) known

18. Apply backshift to “I will be there on time”: He said he ______ be there on time.

a) will
b) would
c) shall
d) might

19. Use the formal subjunctive form: If I ______ rich, I would buy a house.

a) were
b) had been
c) be
d) was

20. This is the book who I borrowed from the library.

a) who
b) which
c) whom
d) whose

C1 Answer Key and Explanations

Question	Answer	Why it fits
1	B: had	The second conditional uses a past form for an imagined present situation.
2	C: will have worked	The future perfect measures completed time up to a future point.
3	C: had studied	The requested third conditional uses a past perfect condition and would have plus past participle.
4	B: had learned	A wish about an unreal past situation takes the past perfect.
5	A: should have been sent	The documents receive the action; should have been plus past participle refers to an expected past action.
6	B: can’t	Can’t expresses the requested strong negative deduction. Mustn’t normally expresses prohibition.
7	A: must	Must expresses the requested confident deduction. May and could would express weaker possibility.
8	C: had been raining	The requested past perfect continuous describes rain continuing before the past postponement decision.
9	B: did I realize	Fronted not until triggers inversion; past simple did is followed by the base verb realize.
10	B: did I understand	Fronted only after triggers inversion in the main clause.
11	C: which	A non-defining relative clause about a thing uses which; that is not used here.
12	B: at	The pattern is good at plus a noun or -ing form.
13	C: to going	The completed phrase is looking forward to going on her holiday. To after look forward is a preposition.
14	B: dropped off	Drop off can mean fall asleep, which fits being tired during a meeting.
15	A: take in	Take in can mean understand or absorb information.
16	A: left behind	Leave someone behind means move ahead of them.
17	C: knew	Wish about a present fact takes a past form: I wish I knew the answer.
18	B: would	The requested backshift changes will to would. Keeping will can be appropriate in other reporting contexts.
19	A: were	Were is the formal subjunctive form for this hypothetical condition. Was also occurs in informal English.
20	B: which	Which refers to the thing, the book; who refers to a person.

Learn more about the C1 English Level (Advanced).

For a broader estimate, complete the Global English Test and review the result alongside evidence from your productive skills.

Final Tips for Success

Practice regularly – consistency is key!
Take mock exams to test your knowledge.
Engage with native speakers to improve fluency.
Expand your vocabulary with idioms & phrasal verbs.
Read advanced materials (newspapers, research papers, etc.).

Ready to test your C1 grammar skills? Take the C1 English Grammar Test now and see if you’re truly advanced!

C1 Grammar Error Diagnosis

Advanced learners often know a rule but fail to apply it when a sentence becomes long or when attention is focused on meaning. Review errors by cause so that your next practice session addresses the real problem.

Error type	What it may show	Useful follow-up
Tense or conditional	The time relationship was not mapped before choosing the verb.	Draw a short timeline and rewrite the sentence with a new situation.
Inversion	The negative or restrictive opener was noticed, but auxiliary order was missed.	Practise pairs such as “I had never seen” and “Never had I seen”.
Preposition or collocation	The problem concerns a fixed word partnership, not a general grammar rule.	Store and review the complete phrase rather than the single word.
Relative clause	The reference to a person, thing, place, or possession was unclear.	Identify the noun first, then decide whether the clause is defining.
Reported speech	Pronouns, time references, or viewpoint were not adjusted consistently.	Rewrite the original quotation and mark every element that changes.

Apply C1 Grammar Beyond Multiple Choice

A multiple-choice item checks recognition under narrow conditions. To test productive control, use the same target structure in a meaningful task.

1. Write a 120-word account of a decision you would change, using mixed or third conditionals.
2. Summarise an interview using reported statements and questions.
3. Write a formal recommendation that distinguishes obligation, advice, probability, and cautious prediction.
4. Edit a paragraph by replacing repeated clauses with accurate relative or participle clauses.
5. Record a two-minute explanation, transcribe it, and correct patterns that repeatedly cause hesitation.

A Better Retest Strategy

Do not retake the same questions immediately. Review the relevant patterns, write new examples, and wait several days. Then use a different set of items and a short writing task. Improvement on unfamiliar material is stronger evidence of learning than remembering the original answers.

Frequently Asked Questions (FAQ)

What is a C1 English grammar test?

A C1 English grammar test evaluates your understanding of advanced grammar structures, complex sentence forms, and nuanced language usage at the C1 level of the CEFR scale.

What is tested in a C1 English level test?

The C1 level English test assesses:

• Grammar (e.g. conditionals, inversion, participle clauses)
• Sentence types and transformations
• Vocabulary range and collocations
• Reading and listening comprehension at an academic level

How can I learn C1 English grammar?

You can learn C1 grammar by:

• Practicing with real test examples
• Using resources like C1 English grammar PDF guides
• Taking online grammar practice quizzes
• Reviewing topics such as advanced tenses, reported speech, and modal verbs in past forms

Are there free PDF resources for C1 grammar?

Yes, you can find downloadable C1 grammar PDF files for practice. Some include bilingual explanations (e.g., Chinese-English) or TOEFL-style exercises.

What types of sentences appear in the English C1 test?

C1-level tests often include:

• Complex sentences
• Relative and conditional clauses
• Passive constructions
• Sentence transformation tasks (e.g., “Rewrite using the word given”)

Is there a difference between C1 grammar and Matura English?

While both refer to advanced grammar knowledge, Matura English is specific to certain European exams. C1 grammar refers to the CEFR global standard.

What are good practice methods for C1 English?

• Daily reading and grammar exercises
• Grammar drills with answer keys
• Practice tests with explanations
• C1 English grammar + practice combo materials (print or Google Drive PDFs)

Explore Grammar Tests for All Levels

To strengthen your grammar skills step by step, try these level-specific grammar tests:

A1 English Grammar Test

A2 English Grammar Test

B1 English Grammar Test

B2 English Grammar Test

C1 English Grammar Test

C2 English Grammar Test