The current practice goal comes first
Five-level practice checks the current level. Focused practice checks only the skill you selected. Both require you to keep the original meaning and avoid serious grammar or expression problems.
Advanced English sentence practice
Your ideas are clear. Your English sentences come out too simple.
Rewrite one plain sentence into a more precise one, step by step, with feedback on each try — until you can do it on your own in essays, exams, and work emails.
Sign in to start. No card required.
Before
Many students think online learning is useful.
1 · Use sharper words
Many students consider online learning valuable.
2 · Change the structure
For many students, online learning has proven valuable.
3 · Add a reason
For many students, online learning has proven valuable because it lets them study at their own pace.
4 · Say it more generally
For many students, the value of online learning lies in the flexibility it offers over when and how they study.
After 5 rewrites
What makes online learning genuinely valuable for many students is the flexibility it gives them over when and how they study.
Five-level practice: rewrite one sentence step by step
Work through vocabulary, structure, logic, abstraction, and integration, one skill at each level.
Use sharper words
Swap a vague word for one that fits.
Change the structure
Keep the meaning, rebuild the sentence.
Add a reason
Back the idea with a cause or effect.
Say it more generally
Replace a specific example with the idea behind it.
Combine everything
Make it read as one natural sentence.
Focused practice: train one skill
Choose vocabulary, structure, logic, abstraction, or integration. The exercise and feedback check only the skill you select.
Each new exercise uses 1 credit. You can submit the same exercise up to 5 times.
How Otonna evaluates your rewrite
Otonna checks the current practice goal first, then looks at whether you kept the original meaning and whether the sentence is clear and natural.
If you disagree with a result
Mark an evaluation that does not seem fair. We use those reports to investigate judgments that are too strict, too lenient, or inconsistent.
Choose a practice plan
Try it free, practice daily, or buy an exercise pack when you need one.
Included once
Free
$0
- Exercises
- 5 exercises total
- How credits work
- Included once
- Best for
- Trying the complete method
Monthly subscription
Daily practice
$9 / month
Recommended
- Exercises
- 10 exercises a day
- How credits work
- Refills daily
- Best for
- Consistent practice
One-time purchase
30-exercise pack
$5
- Exercises
- 30 exercises total
- How credits work
- Use within 12 months
- Best for
- Occasional extra practice
Applicable taxes, if any, are calculated at Checkout.
1 credit starts 1 new exercise. Feedback and resubmissions on the same exercise do not use more credits. Five-level practice allows up to 10 submissions; focused practice allows up to 5.
Trent community offer: verify your @trentu.ca email to receive 10 free credits. Claim offer
FAQ
Frequently Asked Questions
What is Otonna?
Otonna is a guided training platform that helps English learners build accurate, varied complex sentences through progressive rewriting.
How does the 5-level training work?
You start with a simple English sentence. Each level develops one skill: precise vocabulary, structural variation, idea development, abstraction, and natural integration.
What is the difference between focused and five-level practice?
Five-level practice rewrites the same sentence one level at a time. Focused practice works on one skill you choose, allows up to 5 submissions, and does not add the result to your Library.
How are sentence credits deducted?
One credit is used when a new sentence is ready, whether you choose the full five-level method or one focused skill. If Otonna cannot generate or save it, the credit is returned automatically. Rewriting the same sentence and receiving feedback do not use more credits; the full method includes up to 10 submissions and focused practice includes up to 5.
Start with your first sentence
Practice 5 exercises freeSign in to start. No card required.