Grammar Challenges at C2 Level and How to Teach Them

14.05.2026

10 minutes

Grammar
Tips & Strategies
Methodology

There is such a proverb: “The more you learn, the more you realise how little you know.” It is related to every field; language learning isn’t an exception.

There are so many sources to boost your language, to improve it. Regarding modern technology, it is becoming only more and more available: any time of the day, any corner of the world.

There is a lot that one will fancy for themselves: speaking clubs, following trendy bloggers, having a study buddy, online courses, or consuming all the information and news in the origin.

This is okay for maintaining a level or learning more and achieving your cherished C2. However, it feels like not enough to get it.

Why It Is Still Not C2

So many ESL learners struggle with this question.

“Why am I still not at C2 level?”
“I’ve been studying so long and put in so much effort.”
“Nothing is changing.”
“I am stuck at one place and feel depressed.”
“I have learned all grammar rules, and it’s still not enough.”
“It feels like nothing matters because whatever I do doesn’t help.”

The phrases that are well-known for every single teacher. As it’s high time students started reflecting on their learning with a teacher, one can hit upon it.

They crave something without understanding what exactly. There is no idea what to add. But something should be, sure. A formula to master C2 level.

In despair, the ESL learners start to lose their enthusiasm. And it doesn’t even come to their mind that it’s not their fault. What is it?

Whose Blame?

But seriously, every single learner, being on such a level, feels that they are not enough. Something is lacking to be an expert in English.

There is no one blame. It’s a time-comsuiming process, period.

Compare

Let’s imagine a learner “A” who has just started from scratch. He learns an alphabet, some phrases for greeting and making basic dialogues. In 3-4 weeks he can have a small talk. Wow!

One more week passes. This person will learn some more words about his routine, hobbies, work, and can speak even more; he will listen to some songs, short videos, and cartoons. The learner “A” is making such a progress, it’s visible. Wonderful. Two monts ago, he didn’t know a single word in this language.

On the other side, there is a learner “K” who has a C1 level, speaks English at work with business clients every day, and watches films and reads books in the origin, especially detectives.

While reading, the learner writes down every unfamiliar word to memorise them. This learner joins speaking clubs on a regular basis and can maintain lots of conversation. But she does it a long time. She learns new words, speaks, reads… Time passes… And… What happens? Nothing, there is no other level.

The learner “K” does his work diligently and consistently. However, she doesn’t notice any large leaps or changes in her English.

Is a learner “K” worse than a learner “A”? Absolutely not. But the first one thinks like that. They cannot pull themselves together and want to give up. “When I started and had an A1-A2 level, I could see my progress. But now — not.” Here we go again.

The Main Challenge–Valley of Despair

The "Valley of Despair" is a feeling that describes a challenging phase during major changes or learning new skills.

It describes a stage when a person:

feels discouraged or low
loses motivation
doubts themselves
sees little progress despite effort

“It's a common experience in habit formation, business adoption, creative projects, and personal growth, representing the difficult middle ground between starting and achieving a goal,” says James Clear, the author of the book Atomic Habits.

This term, or rather a feeling, is about learning processes, skill development, motivation, change, and adaptation.

It’s exactly about the ESL learners who feel stuck with their level. When the motivation goes away, the discipline is the only lifesaver. However, a lot of factors want to prove the opposite. The students might feel anxious and demotivated. There is such frustration because progress seems slow or invisible at all.

So Why?

Simply, let’s take a look at how much time it takes to come from one level to another.

From → To	Typical Study Time (hours)	Notes
A1 → A2	100–150 hours	Basic phrases → simple communication, everyday situations.
A2 → B1	150–200 hours	Can describe experiences, give opinions, handle familiar situations.
B1 → B2	200–250 hours	Can discuss abstract topics, understand main ideas of complex texts.
B2 → C1	250–300 hours	Fluent communication, academic/work language, nuanced understanding.
C1 → C2	300–400+ hours	Near-native mastery, subtle meanings, idiomatic expressions, highly accurate writing/speaking.

Does it make sense now?

The higher level → more knowledge. More knowledge → more time. More time → your progress won’t be as visible as it was on the beginner level.

If it’s not visible, it doesn’t mean there is no progress. The student can’t see that because what is so tremendous can happen?

C1-C2 level is about mastering everything you already know. There won’t be anything to see. There won’t be such feelings of accomplishment. A lot is already done.

Points to Focus On

The only thing to keep up is to brush up on your skills. And here are some points that the students should pay attention to. And teachers, in their turn, explain and teach.

1. Emphasis, inversion & rhetorical control

The challenge is posed in knowing the structures (cleft sentences, inversion, fronting) but avoiding them. C2-level learners do not use them, losing stylistic effect. For examples:

Negative inversion: I had rarely seen such chaos → Rarely had I seen such chaos.
Cleft sentences: Communication matters most. → What matters most is communication.
Fronting: The days are gone. → Gone are the days.

Techniques and exercises the teacher can provide:

Analysis of authentic texts

Speeches, opinion pieces, news articles — this identifies rhetorical grammar. Ask the students to highlight or underline the structures (making them use different colours). It will help them remember better and immediately spot this in the text.

Neutral vs emphatic comparison

Ask the students to rewrite from the neutral to the emphatic one: I had never seen such a performance → Never had I seen such a performance.

Paragraph rewrite

Moving on to the more challenging task. The teacher enlarges it from a sentence till the whole paragraph. The students need to rewrite a paragraph to sound: more dramatic/more cautious/more authoritative. Then they can discuss it with their partners and compare.

2. Fossilised “almost correct grammar”

These are so-called slips or small mistakes in grammar, which are done unintentionally. The challenge is that these are rare but persistent errors, often emotionally defended by the learners.

Examples:

I am agree.
Depends of.
I go to the store yesterday.

That doesn’t mean a person makes it constantly or doesn’t know the correct form. Being tired, confused, or just inattentive will lead to slipping out. That’s why it is called like this: it just “slips out of your tongue”.

Here some should focus on raising awareness, not just correction.

Delayed feedback

Categorise errors (verb choice, preposition, structure) and discuss patterns rather than single corrections.

Let them make mistakes

While speaking, the students say something incorrectly and notice it themselves. The teacher should not correct every single mistake on the spot. At first, time to finish their thoughts, then correct themselves, then the teacher’s time.

Reformulation instead of correction

The teacher writes a corrected version; the learners explain differences.

Detectives

A few times during the lesson, the teacher gathers some phrases and writes them as they were mentioned. The students’ task is to find these mistakes and correct.

Sometimes it can be a mix of phrases with mistakes and corrected ones so that it poses a bigger challenge for them and interest at the same time.

3. Subtle meaning difference

The obstacle is that the ESL learners are rarely wrong grammatically. The issue is precision and nuance. They often confuse structures that are almost synonymous but carry subtle differences in tone, formality, or emphasis. For instance:

will/going to/present continuous (future intentions vs plans vs predictions)
should have done/ought to have done (moral obligation vs advice/regret)
I suppose/I assume/I take it/I gather (certainty vs inference vs polite guess)
hardly…when/no sooner…than (formal inversion, literary style)

The teaching approach here is grammar as choice, not rule. Here are the contrast sentences in context:

He didn’t call.
– I suppose he forgot. (neutral guess)
– I take it he forgot. (inference from evidence)

Techniques and exercises the teacher can provide:

Rank

The students rank phrases by certainty or formality. Example:

I assume
I suppose
I gather
I take it

→ 1 = most formal, 4 = most casual.

Justification exercise

The teacher gives three correct options in a sentence.

Ask: Why does one fit best?

Example: “She ___ left early.” (Options: will/is going to/has)

This is not about grammar so much as about learning to analyse and understand the context.

Dialogues

The students rewrite dialogues, replacing one near-synonym with another, and discuss how meaning or tone changes.

4. Advanced verb patterns

Even C2 learners sometimes misapply complex verb + object + complement structures and verbs whose meaning shifts with structure. That becomes a stumbling block, too. Common errors are as follows:

He was made to resign vs He was forced into resigning
remember doing vs remember to do

Here the focus is on grammar frames and verb maps:

Verb maps by function

The teacher gives some verbs that should be mapped by their functions: blame/accuse/charge

blame sb for sth
accuse sb of doing
charge sb with sth

Verb maps by function. Challenging

The students’ task is to enlarge the list with their own examples.

Reformulation exercise

The teacher gives one sentence and asks the students to rewrite it using three different verb structures.

“They forced him to resign.”

He was made to resign.
He was forced into resigning.
They compelled him to resign.

Error detection game

The teacher asks to provide sentences with subtle mistakes in argument structure. The students identify and correct them.

5. Register control (formal, frozen, consultative, casual, intimate)

One more point to face is registers. C2 learners must match grammar and vocabulary to register. Mixing them is a common problem. For instance:

This essay is gonna look at… (informal in academic writing)
The government messed up significantly. (neutral/informal in formal report)

Techniques and exercises the teacher can provide:

Labeling task

Present sentences and ask the students to label them as: formal, frozen, consultative, casual, and intimate.

Rewrite tasks

Casual → formal
formal → conversational, etc.

Audience adaptation

Provide a message; your students rewrite it for:

Friend (informal)
Manager (neutral/professional)
Academic reader (formal)

Mini-dialogues

The students role-play sending messages to different audiences, noticing shifts in grammar/lexis.

6. Complex clause structure

Another challenge is with embedding, reduced relative clauses, participle clauses, and nominalisation. Example:

Having been repeatedly overlooked, the proposal was eventually withdrawn.

Techniques and exercises the teacher can provide:

Compression exercise

Start with 3 simple sentences → compress into 1 dense sentence.

Original: “The committee ignored the proposal. It was well-researched. It had support from experts.”
Compressed: “Having been well-researched and supported by experts, the proposal was ignored by the committee.”

Sentence surgery

Ask the students to cut, compress, and reformulate sentences without changing meaning.

Reverse task

Ask the students to unpack dense sentences into simpler ones for clarity.

Participle clause drills

Provide a main clause and ask the learners to add participle clauses expressing time, cause, or condition.

7. Grammar and cohesion

Grammar at the C2 level works across sentences, not just inside them. Common misuses: referencing, substitution, and ellipsis.

“This shows that…” (vague reference)

Techniques and exercises the teacher can provide:

Reference chain highlighting

The students underline pronouns, determiners, and substitutes in texts.

Ask: What does “this” refer to?

Replacement exercise

The teacher asks to replace vague referencing with precise noun phrases.

Vague: “This led to problems.”
Precise: “The lack of coordination led to problems.”

Discourse completion task

The students complete a paragraph, ensuring clear cohesion and avoiding ambiguity.

Final Tips

There is a variety of ways to beat that C2 level. However, one should not forget about some individual factors as learning style. Some people need more structured grammar study. Others improve faster through immersion. This is the feature of the brain and it cannot be changed.

Despite teaching and accepting the flow of the natural process, the teacher should keep in mind that:

Consistency matters more than intensity. Studying 1 hour every day is much better than 5 hours once a week.
Active practice accelerates progress. This is everything: speaking, writing, working on mistakes, and getting feedback.
Exposure. Reading books, listening to podcasts, watching shows, and interacting with native speakers helps a lot.

These are truths to establish for the students. What’s more, don’t forget to explain not only grammar to your ESL learners but also a bit of psychology. This is what they need. Acknowledgement.

“When you start learning something new, motivation is high. Then progress feels hard and slow — that’s the valley of despair. If you keep going, confidence and results rise again.” This is a note to bear in mind.