C1 Advanced

Use English with precision and style

C1 means flexible, spontaneous English: you can write essays, negotiate, infer meaning, and vary your language for effect.

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Emphasise ideas with cleft sentences and inversion
Present arguments carefully with hedging language
Write and speak in a formal, academic register
Grammar

Lessons for level C1

Read each lesson and mark it as complete when you feel confident.

Lesson 1

Inversion

Put the auxiliary before the subject for emphasis — common after negative adverbials.

Never have I seen such a mess.  ·  Not only did she sing, but she also danced.
Hardly had we arrived when it started raining.  ·  No sooner had I sat down than the phone rang.
Tip: Inversion is formal. In casual speech: "I've never seen such a mess."
Lesson 2

Cleft sentences

Split a sentence to stress one part: It is…that / What…is.

It was the manager who made the decision. (not someone else)
What I need is a holiday.  ·  The reason I called is to apologise.
Tip: Use clefts to answer "which one?" implicitly and to make writing feel sophisticated.
Lesson 3

Hedging language

Softening claims makes you sound careful and credible: tends to, appears to, arguably, somewhat.

It could be argued that the policy is outdated.  ·  The results appear to confirm the theory.
To a certain extent, the findings are surprising.
Tip: Hedging is essential in academic writing — strong claims without evidence sound naive.
Lesson 4

Advanced modals of deduction

Deduce about the past: must have, can't have, might have, should have.

She must have forgotten the meeting. (logical conclusion)
He can't have seen the email.  ·  They might have missed the train.  ·  You should have told me earlier.
Tip: Should have + pp = criticism or regret; needn't have + pp = you did something unnecessary.
Lesson 5

The subjunctive & fixed phrases

The base form after certain verbs: recommend, suggest, insist, demand — formal and strong.

I recommend that he see a lawyer.  ·  They insisted that she be present.
"If I were…" also uses the subjunctive: If I were in charge, things would change.
Tip: In everyday British English people often use "should": "I suggest that he should see a lawyer."
Lesson 6

Discourse markers

Link your ideas in writing and speaking: however, nevertheless, moreover, consequently, in contrast.

Sales fell. Nevertheless, profits rose.  ·  Moreover, customer satisfaction improved.
Sequence: Firstly… Secondly… Finally….  ·  Contrast: In contrast to last year…
Tip: Don't open every sentence with a connector — vary sentence structure for readable prose.
Vocabulary

Academic & formal words — C1

Click any word to see its definition and example on a flashcard.

significantimportant or large enough to matterclick for flashcard →
endeavourto try hard to do somethingclick for flashcard →
ambiguousopen to more than one interpretationclick for flashcard →
widespreadhappening across many places or peopleclick for flashcard →
inevitablecertain to happenclick for flashcard →
distinguishto see or show the differenceclick for flashcard →
reluctanthesitant, not wanting to do somethingclick for flashcard →
deteriorateto become worseclick for flashcard →
sufficientenoughclick for flashcard →
emphasiseto give special importance toclick for flashcard →
obsoleteno longer used or usefulclick for flashcard →
implyto suggest without saying directlyclick for flashcard →
controversialcausing strong disagreementclick for flashcard →
feasiblepossible and practicalclick for flashcard →
negligibleso small it doesn't matterclick for flashcard →
notwithstandingdespite somethingclick for flashcard →
Test yourself

C1 quiz

Answer the questions, then press "Check answers" to see instant feedback.