Knowing that impact means âeffectâ doesnât mean youâll write have an impact on correctly. In LetsWords, you write a sentence with the word youâre learning, and the check shows whatâs stopping you from saying it right: the collocation, the preposition, the structure or the form of the word. You get a corrected version and an explanation in your native language, and you can put it to use in your very next attempt.
Below are 12 real LetsWords checks. These are words for conversation, emails and IELTS Writing, not rare vocabulary for the sake of it. First come sentences with mistakes, and at the end two correct ones: they show what the feedback gives you when thereâs nothing to fix.
What you get after a check
Each example shows the original sentence, what LetsWords returned and why it helps you learn. The product gives its explanations in Russian, Korean or Vietnamese, depending on your native language; here theyâre retold in English. Detailed feedback is available both when you learn a word and when you review it.
A correction removes a mistake; a rephrase shows another way to express the idea. Theyâre not the same thing: a correct sentence doesnât become wrong just because it could be developed further. The check takes your chosen goal into account. The exam examples below were checked for IELTS Academic Writing with a target of 7.0; the business email and the sentence about progress were checked for general English at B2.
1. Impact: two mistakes around a word you already know
Written:
The new transport policy did a significant impact to air quality in the city.
LetsWords: mistakes found. The collocation here is have an impact on. So in the past tense itâs had, and before the thing affected itâs on. The check fixes both parts: did â had, to â on.
Correction:
The new transport policy had a significant impact on air quality in the city.
Why it helps. Knowing what impact means doesnât tell you which verb and preposition go with it. Here LetsWords fixed both parts of the collocation and kept the point about transport policy. You learn to use have an impact on as a whole, in essays on the environment, education or technology, instead of just recognising the word impact.
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2. Suggest: the meaning is right, the structure isnât
Written:
My tutor suggested me to compare the two views before giving my opinion.
LetsWords: mistakes found. Suggest canât be followed by me to: suggest someone to do is wrong. The action takes the -ing form: suggested comparing.
Correction:
My tutor suggested comparing the two views before giving my opinion.
LetsWords rephrase:
My tutor suggested that I compare the two perspectives before expressing my own view.
Why it helps. You get two correct patterns at once: suggest doing when naming the action is enough, and suggest that someone do when it matters who should do it: suggested that I compare. Both will come in handy the next time you make a recommendation in an email or essay. These patterns are described in the Cambridge grammar guide.
3. Adopt: take on a new routine, donât blend two verbs
Written:
Students need to adopt to a new routine when they start university.
LetsWords: mistakes found. Adopt takes no preposition: adopt a new routine means to take it on.
Correction:
Students need to adopt a new routine when they start university.
Why it helps. Adopt and adapt look alike and are easy to mix up. Adopt a routine means taking it on; adapt to a routine means getting used to it. LetsWords kept the verb you were practising, adopt, and showed how to build a meaningful sentence with it. You learn how to use the verb you need, instead of simply having it swapped for another word.
4. Look forward to: a mistake in an everyday business email
Written:
I look forward to hear from you about the interview.
LetsWords: mistakes found. In look forward to, to is a preposition, so itâs followed by the -ing form: hearing, not hear. Same pattern: look forward to meeting, look forward to working, look forward to seeing.
Correction:
I look forward to hearing from you about the interview.
Why it helps. You understand why the -ing form is needed here, so you can write the next message yourself: about a meeting, working together or a follow-up call. The fix is useful well beyond this one line of an email. Youâll find the meaning and another example in the look forward to exercise.
5. Evidence: the fix changes the whole structure, not just one ending
Written:
There are many evidences that regular exercise improves mental health.
LetsWords: mistakes found. In the sense of âproofâ, evidence is uncountable: no -s, and the verb is singular. So itâs there is, and the amount is much evidence or a lot of evidence, not many evidences.
Correction:
There is much evidence that regular exercise improves mental health.
LetsWords rephrase:
Substantial evidence indicates that regular exercise improves mental health.
Why it helps. Dropping the -s isnât enough: with uncountable evidence, the verb and the quantity word have to agree too. LetsWords fixed the whole chain, then offered a tighter academic version. You learn not only to avoid the mistake but also how to introduce evidence in IELTS Writing.
6. Despite: a strong linker wonât save broken grammar
Written:
Despite the government invested in public transport, traffic congestion continued to increase.
LetsWords: mistakes found. Despite canât be followed directly by the government invested: you need despite the governmentâs investment. Another way to say the same thing is although the government invested.
Correction:
Despite the governmentâs investment in public transport, traffic congestion continued to increase.
Why it helps. You wanted to show a contrast: money was invested, yet congestion kept growing. LetsWords kept that argument and fixed the structure after despite. Thatâs worth more than mechanically swapping in a simpler linker: you master the very tool you meant to use. British Council explains the difference between despite and although.
7. Contribute: an academic word still has to connect to an action
Written:
Poor public transport contributes to increase traffic congestion.
LetsWords: mistakes found. In contribute to, to is a preposition, so itâs followed by the -ing form: contributes to increasing, not to increase.
Correction:
Poor public transport contributes to increasing traffic congestion.
Why it helps. This practises the pattern contribute to doing: youâre not just naming a problem, youâre explaining what causes it. The same pattern works in an essay on any topic: contribute to reducing emissions, contribute to improving public health.
8. Affect: the preposition that feels natural but doesnât belong
Written:
Air pollution can negatively affect on the health of children.
LetsWords: mistakes found. Affect takes no preposition: affect the health of children, not affect on.
Correction:
Air pollution can negatively affect the health of children.
Why it helps. The nouns with the same meaning do take on: an effect on, an influence on, have an impact on from the first example. Thatâs why affect on sounds right to so many learners. The verb affect goes straight to its object. The check teaches you to tell apart two structures with similar meanings, and a memorised word-and-translation pair isnât enough for that.
9. Progress: why you donât do progress
Written:
I have done a lot of progress in English since I started practising every day.
LetsWords: mistakes found. With progress, English uses make, not do: make a lot of progress.
Correction:
I have made a lot of progress in English since I started practising every day.
Why it helps. Every word is familiar and the idea is clear, yet the collocation is still wrong. LetsWords fixes exactly that, without making you rewrite the whole story. You come away with a phrase for describing progress in your studies, a project or your training. Lock in the collocation with the make progress exercise.
10. Significant increase: precision in an IELTS chart description
Written:
The chart shows a significant increase of the number of commuters between 2010 and 2020.
LetsWords: mistakes found. When you name what went up, the preposition is in: an increase in the number of commuters. Of goes before the size of the rise: an increase of 20%.
Correction:
The chart shows a significant increase in the number of commuters between 2010 and 2020.
Why it helps. Significant is already the right word; thereâs no need to swap it for something fancier. LetsWords fixes the structure next to it and keeps the time period and the figure being described. This is vocabulary practice in a sentence for Task 1: you catch mistakes before youâve written a full chart description.
11. Mitigate: reducing the effects isnât solving the problem
Written:
Investing in flood defences can mitigate the effects of climate change on coastal communities.
LetsWords: correct. No mistakes: the word choice is precise, the structure is correct, and the style suits an academic essay.
Why it helps. Flood defences donât stop climate change, but they can reduce its effects on coastal communities. Thatâs exactly what mitigate the effects says. LetsWords accepts precise usage and doesnât demand a different word or more complex grammar. You learn to choose academic vocabulary by meaning: here the point is to say âsoften the effectsâ, not to promise âsolve the problemâ.
12. Play a role: correct isnât the same as convincing
Written:
Public libraries play a role in reducing digital exclusion.
LetsWords: correct. No mistakes: the vocabulary is precise and the structure is correct.
LetsWords rephrase:
Public libraries play a vital role in reducing digital exclusion by providing free internet access, digital skills training, and support for disadvantaged communities.
Why it helps. The original sentence only claims that libraries are useful. The suggested version explains how: internet access, digital skills training and support for people who need it. Thatâs a model of developing an argument for IELTS Writing. You see how to extend an idea, instead of being told âadd more detailâ with no example.
From one correction to words you actually use
In every example, the work starts with your attempt to express an idea. LetsWords reviews it, shows the correction and explains the reason. Then spaced repetition brings the word back in later sessions: you recall it again and write a new sentence. The correct structure gets carried into practice instead of staying a tip you read once.
You can start with ready-made sets or add vocabulary from reading, work and classes. If you canât think of what to write about, the generator suggests an idea in your native language. For IELTS, practice continues in Writing: from a single passage and one criterion to a full answer with feedback.
Want the next sentence with a new word to come out right? When you sign up for LetsWords, you choose your goal and level, then try your first writing exercise with feedback before you pay.
Read more: English vocabulary trainer, IELTS vocabulary by topic and IELTS Writing practice.