How to Prepare for the Duolingo English Test From B1 to 110-120 (4 Shifts That Break the Plateau)

By Sean Kivi10 min read
Frustrated student at laptop trying to break the DET plateau between 110 and 120
Stuck at DET 110-120 isn't a vocabulary problem. It's a thinking problem.

If your DET score is stuck at 110, 115, or just under 120 — and you've been studying for weeks — the problem is almost never what you think it is.

You don't need more vocabulary lists. You don't need more practice tests. You don't need to memorize more templates. You need to do four specific things differently, and most students at this level never do them because no teacher tells them to.

This isn't a generic "study more, you'll get better" post. I'll show you the four shifts using a real student I worked with — Omar, a French-Arabic speaker scoring around 120 on practice tests, trying to break into the 125-135 range. The shifts that worked for him are the same ones I see work for almost every student who's stuck at this stage.

Quick check before you read on: If you're scoring below 110, this post isn't for you yet. Different problem, different fix. Read this one instead.

Why Practice Tests Aren't Moving Your Score

Most students stuck below 120 are doing the same thing on repeat: more practice tests, more vocabulary apps, more grammar drills. The score doesn't move, or it moves a few points and stalls again.

Here's why. Below 110, your problem is usually language — you don't know enough words, your grammar isn't stable yet, your reading is slow. More practice fixes that.

Above 110, your language is fine. What's broken is how you handle the test under time pressure. The DET isn't measuring whether you know English. It's measuring whether you can use it fast enough, accurately enough, and consistently enough across all four skills. Each score band tests something different, and 110-120 is where the test stops measuring knowledge and starts measuring control.

That's a completely different problem than the one you've been trying to solve. Here are the four things stuck students get wrong — and what to do instead.

Shift 1: Stop Listening for Words. Start Listening for Verbs.

The first time Omar took notes on a listening passage in our session, he wrote down everything he caught — random nouns, adjectives, names, places. When the audio finished, he had a page of words and no idea what the speaker actually said.

Most students do this. They hear "photographer," "kids," "Antarctica," "communities," "flexible" — but they can't reconstruct what happened, what the person did, or what their point was. They were catching content words, not the spine of the sentence.

Here's what I told him:

"Listen for the verbs. Don't listen for the extra words. The verb tells me what happened. Everything else is a detail."

Verbs are the spine. "Got started" — something began. "Changed my major" — a decision. "Traveled to every continent" — an action. If you can catch the verbs in order, you have the story. The nouns and adjectives fill in around them, but if you miss the nouns, you can usually still answer the question. If you miss the verbs, you've lost the entire passage.

To practice this, take any English-language YouTube video at your level, listen once, and write down only the verbs in the order you hear them. Then check whether you can summarize the video from just the verb list. At first you can't. After two weeks of doing this for ten minutes a day, you can.

This is the single biggest fix for the DET listening section, and almost no one teaches it. It also pairs with the speaking skill 96% of test-takers fail — both come from listening to the wrong thing.

Shift 2: Write English-Style. Put the Big Idea First.

If your first language is French, Spanish, Portuguese, Italian, or Arabic, your writing is probably losing you points for a reason that has nothing to do with grammar.

In those languages, you build an argument like this: context first, examples in the middle, the main point at the end. It feels logical because it leads the reader through the reasoning. In English academic writing — and on the DET — that structure scores low.

English flips it. The main point goes first. Then you support it with examples. Then you restate it. The reader doesn't want to be led to your conclusion — they want to know your conclusion immediately and then see why you believe it.

When Omar started his interactive writing answer, he wrote three lines of context before getting to his point. I stopped him and explained:

"In Spanish, and I think French is the same way, you can add context all throughout, and then at the bottom, you say what your final idea is. We flip it in English. You start: here's what I'm gonna talk about. The big idea. And then you go backwards, adding examples to support it."

For DET interactive writing, this means your first sentence has to be your answer to the question. Not background. Not setup. The answer. Then your next sentences support it.

The second piece of this shift is making your main point specific. Most students at this level write theses like "Social media companies should be responsible." It's vague enough that it could mean anything. The fix is what I call the specificity test: ask yes-or-no questions of your own sentence until it can't be misread.

Compare these two:

Social media companies should be responsible.

England's populist movement in 2026 largely and incorrectly portrays Muslim immigrants as negative for British society.

The second one passes the test. Is this about America? No. Is it about Morocco? No. Is it about all of British history? No. Every yes-or-no question gets a clear answer, which means the reader knows exactly what you're going to argue. That's what scores high.

The other writing trap to avoid: cycling through synonyms hoping to sound advanced. The DET catches that, and it costs more points than students realize.

Shift 3: Slow Your Mouth. Keep Your Brain Moving.

When Omar answered speaking questions, he spoke fast. Native-speaker fast. He thought speed equalled fluency. Then halfway through every answer, he ran out of things to say, started filling space with "uh" and "um," and lost his structure.

This is the most common mistake students make on DET speaking. Your brain runs faster than your mouth — but if your mouth runs at brain speed, you have no time to plan the next sentence while you're still finishing this one.

The fix sounds counterintuitive: speak at roughly half the speed you're speaking now. When your mouth is slow, your brain has time to set up what comes next. Your speech sounds more controlled, your ideas connect better, and you stop filling silence with filler.

Pair this with what I call bridge phrases — short stalling phrases that buy you a few seconds without making it obvious. "Let me clarify." "What I mean is." "Actually." "To put it another way." Native English speakers use these constantly. They sound natural, they don't lose you points, and they give you two seconds to figure out the next sentence.

To practice, pick any DET-style speaking question, set a timer for 30 seconds, and force yourself to fill the full 30 seconds. Most students at this level finish in 12. Speaking slower and using bridge phrases is how you stretch 12 seconds of real content into 30 seconds of a strong, paced answer.

If your problem is full freezing rather than running out fast, the timer-freeze pattern needs a different fix.

Shift 4: The DET Catches Patterns, Not Single Mistakes

This is the most important shift, because it changes how you study.

The DET is adaptive. It's not grading each answer in isolation. It's looking at every answer you give across the entire test and asking one question: is this person making the same kind of mistake repeatedly, or did they slip up once?

One mistake during a 60-minute test is normal. Native speakers make those — they're called production errors, and the DET ignores them. But if you make the same mistake five times — same wrong verb tense, same missed article, same sound you can't pronounce, same word-class confusion — that's a pattern. The DET catches it and your score reflects it.

What this means for studying: stop trying to fix every individual mistake you make on practice tests. That's whack-a-mole and it won't move your score. Instead, find the two or three patterns that are systematically costing you points across multiple sections, and fix those.

For Omar, his patterns were: short-I sound recognition (he heard "feet" when the audio said "fit"), CH/SH confusion (chip vs. ship), and connected speech in fast English ("might be" sounds like "mai-bee"). Once I diagnosed those three, his listening score had a clear path forward — not "study more," but "fix these three things." That's a 30-day plan, not an open-ended grind.

Most students never get this diagnosis. They study harder instead of studying smarter. The score stays flat.

How Long Should This Take?

Realistically, if you do these four shifts seriously and consistently:

4-6 weeks of focused work usually produces a 5-10 point move. That's enough to take you from 110 to 115-120, or from 115 to 120-125.

6-8 weeks of focused work usually produces a 10-15 point move. That's the bigger jump — 110 into the 120-125 range, or 115 into 125-130.

What won't work is six months of more practice tests. That's the trap. The plateau isn't about volume of study. It's about doing the right four things. My full DET preparation guide covers the broader strategy, but if you're already past the basics and just stuck, the four shifts above are where the leverage is.

The Honest Catch

Reading this post won't move your score by itself. The reason these shifts work for students like Omar is that someone watched him write, listen, and speak in real time — and identified the specific patterns costing him points.

Your patterns aren't Omar's. You might have his short-I problem or you might not. You might have the writing inversion problem or you might already write English-style. The four shifts are the right framework. But the value comes from knowing which one is your weakest, and which specific patterns inside that shift are costing you the most.

That's what a diagnostic does. Book a 60-minute DET diagnostic and I'll find the two or three patterns blocking your score and tell you exactly what to work on. No generic advice. No "study more." Just the specific fixes that move your number.

If you'd rather keep working on your own, that's fine too. Pick one shift from this post — listening for verbs is usually the highest-leverage starting point — and work on it for two weeks before moving on. You'll see whether the approach moves your score before you decide whether you want help.

Frequently Asked Questions

Why is my DET score stuck at 110?
If your score is stuck at 110, your English is fine — what's broken is how you handle the test under time pressure. Below 110, more practice and vocabulary fixes the problem. Above 110, you need to change four specific things: how you listen (verbs first), how you write (big idea first), how you speak (slower mouth, faster brain), and how you study (fix patterns, not single mistakes).
How long does it take to go from DET 110 to 120?
With focused work on the right shifts, 4-6 weeks usually produces a 5-10 point move. So 110 to 115-120 in about a month and a half is realistic. Going from 110 to 125 takes 6-8 weeks of consistent focused practice. What does not work is six months of more practice tests — the plateau is not about volume of study.
Why does my DET score keep stalling even though I study hard?
Most students study by doing more practice tests and reviewing every individual mistake. That is whack-a-mole. The DET is adaptive — it looks for patterns of mistakes across the entire test, not single errors. If you make the same mistake five times, that is a pattern. If you make it once, the test ignores it. Studying smarter means finding your two or three patterns and fixing those, not chasing every error.
Why is my DET writing score not improving even though my grammar is good?
If your first language is French, Spanish, Portuguese, Italian, or Arabic, you are likely structuring your answer the way you would in your first language — context first, main point at the end. English flips this. The main point goes first, then you support it with examples. Most B1-to-120 students write three lines of context before getting to their thesis, which scores low on DET interactive writing.
Why do I freeze when I speak on the DET?
Most students at this level speak too fast and run out of things to say halfway through. Your brain runs faster than your mouth, but if your mouth runs at brain speed, you have no time to plan the next sentence. The fix is to deliberately speak at half your normal speed and use bridge phrases like 'let me clarify' or 'what I mean is' to buy thinking time.

About LU English

LU English is a diagnostic-first English tutoring school. We identify exactly what is blocking your test score, then fix it through targeted 1:1 sessions. Founded by Sean Kivi — MA Translation Studies (University of Nottingham), Texas Bilingual Educator certified, 10+ years across 7 countries.

Learn more about LU English

Find out what's blocking your score

One diagnostic session identifies exactly what to fix first — then every lesson targets that.