Datasets:

martinsr
/

gec-targeted-corrections-esl

src stringlengths 25 94	tgt stringlengths 21 90	pattern_id stringclasses 20 values	category stringclasses 15 values
I have so many homeworks tonight that I can't go out.	I have so much homework tonight that I can't go out.	mass_noun_homeworks	Noun Number
The teacher gave us three homeworks over the weekend.	The teacher gave us a lot of homework over the weekend.	mass_noun_homeworks	Noun Number
She asked her friends for advices about the new job.	She asked her friends for advice about the new job.	mass_noun_homeworks	Noun Number
He gave me some very useful advices before the interview.	He gave me some very useful advice before the interview.	mass_noun_homeworks	Noun Number
I found some interesting informations on the website.	I found some interesting information on the website.	mass_noun_homeworks	Noun Number
Can you send me the informations about the conference?	Can you send me the information about the conference?	mass_noun_homeworks	Noun Number
We need to buy new furnitures for the living room.	We need to buy new furniture for the living room.	mass_noun_homeworks	Noun Number
All the furnitures in the office were replaced last year.	All the furniture in the office was replaced last year.	mass_noun_homeworks	Noun Number
The lab is missing some important equipments.	The lab is missing some important equipment.	mass_noun_homeworks	Noun Number
They ordered new equipments for the gym.	They ordered new equipment for the gym.	mass_noun_homeworks	Noun Number
My luggages were lost at the airport.	My luggage was lost at the airport.	mass_noun_homeworks	Noun Number
She packed three luggages for her month-long trip.	She packed three pieces of luggage for her month-long trip.	mass_noun_homeworks	Noun Number
He shared his knowledges about machine learning with the team.	He shared his knowledge about machine learning with the team.	mass_noun_homeworks	Noun Number
Her knowledges of Spanish helped a lot during the trip.	Her knowledge of Spanish helped a lot during the trip.	mass_noun_homeworks	Noun Number
We did many researches before choosing a supplier.	We did a lot of research before choosing a supplier.	mass_noun_homeworks	Noun Number
The scientist published several researches this year.	The scientist published several research papers this year.	mass_noun_homeworks	Noun Number
There were heavy traffics on the motorway this morning.	There was heavy traffic on the motorway this morning.	mass_noun_homeworks	Noun Number
The traffics in the city center are always terrible.	The traffic in the city center is always terrible.	mass_noun_homeworks	Noun Number
She listens to many musics while she studies.	She listens to a lot of music while she studies.	mass_noun_homeworks	Noun Number
The musics played at the wedding were beautiful.	The music played at the wedding was beautiful.	mass_noun_homeworks	Noun Number
He has made great progresses in his English lessons.	He has made great progress in his English lessons.	mass_noun_homeworks	Noun Number
We are very pleased with the progresses you have made.	We are very pleased with the progress you have made.	mass_noun_homeworks	Noun Number
The weathers in Scotland can change very quickly.	The weather in Scotland can change very quickly.	mass_noun_homeworks	Noun Number
We had some very bad weathers during our camping trip.	We had some very bad weather during our camping trip.	mass_noun_homeworks	Noun Number
Could you give me some advices on how to prepare?	Could you give me some advice on how to prepare?	mass_noun_homeworks	Noun Number
My parents always gave me good advices when I was young.	My parents always gave me good advice when I was young.	mass_noun_homeworks	Noun Number
Do you have any homeworks due tomorrow?	Do you have any homework due tomorrow?	mass_noun_homeworks	Noun Number
He forgot to do his homeworks before the class.	He forgot to do his homework before the class.	mass_noun_homeworks	Noun Number
We received a lot of useful informations from the seminar.	We received a lot of useful information from the seminar.	mass_noun_homeworks	Noun Number
She collected all the necessary informations for the report.	She collected all the necessary information for the report.	mass_noun_homeworks	Noun Number
The company donated old furnitures to the charity.	The company donated old furniture to the charity.	mass_noun_homeworks	Noun Number
We had to assemble all the furnitures ourselves.	We had to assemble all the furniture ourselves.	mass_noun_homeworks	Noun Number
The hospital lacks basic medical equipments.	The hospital lacks basic medical equipment.	mass_noun_homeworks	Noun Number
All the equipments must be sterilised before use.	All the equipment must be sterilised before use.	mass_noun_homeworks	Noun Number
She has a lot of knowledges about ancient history.	She has a lot of knowledge about ancient history.	mass_noun_homeworks	Noun Number
Their knowledges of the local area proved very useful.	Their knowledge of the local area proved very useful.	mass_noun_homeworks	Noun Number
The students did many researches for their project.	The students did a lot of research for their project.	mass_noun_homeworks	Noun Number
He found conflicting researches on the topic.	He found conflicting research on the topic.	mass_noun_homeworks	Noun Number
I had terrible traffics on the way to the airport.	I had terrible traffic on the way to the airport.	mass_noun_homeworks	Noun Number
The traffics during rush hour make me very stressed.	The traffic during rush hour makes me very stressed.	mass_noun_homeworks	Noun Number
I left my luggages at the hotel reception.	I left my luggage at the hotel reception.	mass_noun_homeworks	Noun Number
Please keep your luggages in the overhead compartment.	Please keep your luggage in the overhead compartment.	mass_noun_homeworks	Noun Number
He plays many different musics on his guitar.	He plays many different types of music on his guitar.	mass_noun_homeworks	Noun Number
The musics from the concert could be heard outside.	The music from the concert could be heard outside.	mass_noun_homeworks	Noun Number
The children are making slow progresses with reading.	The children are making slow progress with reading.	mass_noun_homeworks	Noun Number
We reviewed all the progresses made over the last quarter.	We reviewed all the progress made over the last quarter.	mass_noun_homeworks	Noun Number
The weathers last summer were unusually hot.	The weather last summer was unusually hot.	mass_noun_homeworks	Noun Number
They checked the weathers forecast before sailing.	They checked the weather forecast before sailing.	mass_noun_homeworks	Noun Number
She always asks for advices before making big decisions.	She always asks for advice before making big decisions.	mass_noun_homeworks	Noun Number
The doctor gave him very specific advices about his diet.	The doctor gave him very specific advice about his diet.	mass_noun_homeworks	Noun Number
He gave me a good information about the train times.	He gave me some good information about the train times.	article_before_uncountable	Article
She has a useful knowledge of French.	She has useful knowledge of French.	article_before_uncountable	Article
Can I give you an advice about your presentation?	Can I give you some advice about your presentation?	article_before_uncountable	Article
He offered me a helpful advice when I was struggling.	He offered me some helpful advice when I was struggling.	article_before_uncountable	Article
We need to buy a new furniture for the bedroom.	We need to buy new furniture for the bedroom.	article_before_uncountable	Article
She picked a beautiful furniture from the catalogue.	She picked some beautiful furniture from the catalogue.	article_before_uncountable	Article
They purchased a modern equipment for the studio.	They purchased modern equipment for the studio.	article_before_uncountable	Article
The factory installed a new equipment last month.	The factory installed new equipment last month.	article_before_uncountable	Article
I have a homework to finish before tomorrow.	I have homework to finish before tomorrow.	article_before_uncountable	Article
She did a quick homework on the history of Rome.	She did some quick homework on the history of Rome.	article_before_uncountable	Article
He conducted a research on renewable energy.	He conducted research on renewable energy.	article_before_uncountable	Article
We need to do a further research before publishing.	We need to do further research before publishing.	article_before_uncountable	Article
She made a good progress in her studies this term.	She made good progress in her studies this term.	article_before_uncountable	Article
The patient is making a slow progress after the surgery.	The patient is making slow progress after the surgery.	article_before_uncountable	Article
We had a terrible traffic on the highway.	We had terrible traffic on the highway.	article_before_uncountable	Article
There was a heavy traffic outside the stadium.	There was heavy traffic outside the stadium.	article_before_uncountable	Article
She plays a classical music every evening.	She plays classical music every evening.	article_before_uncountable	Article
They listened to a beautiful music at the festival.	They listened to beautiful music at the festival.	article_before_uncountable	Article
He packed a light luggage for the weekend trip.	He packed light luggage for the weekend trip.	article_before_uncountable	Article
She was carrying a heavy luggage through the station.	She was carrying heavy luggage through the station.	article_before_uncountable	Article
The company shared a confidential information with the board.	The company shared confidential information with the board.	article_before_uncountable	Article
I need an accurate information about the flight departure.	I need accurate information about the flight departure.	article_before_uncountable	Article
She has an extensive knowledge of Roman law.	She has extensive knowledge of Roman law.	article_before_uncountable	Article
He gained a practical knowledge during his internship.	He gained practical knowledge during his internship.	article_before_uncountable	Article
We bought a comfortable furniture for the waiting room.	We bought comfortable furniture for the waiting room.	article_before_uncountable	Article
The designer chose a minimalist furniture for the apartment.	The designer chose minimalist furniture for the apartment.	article_before_uncountable	Article
He offered me an important advice before the exam.	He offered me some important advice before the exam.	article_before_uncountable	Article
Her mother gave her a wise advice about relationships.	Her mother gave her wise advice about relationships.	article_before_uncountable	Article
They discovered a new information that changed everything.	They discovered new information that changed everything.	article_before_uncountable	Article
Can you provide a detailed information on the topic?	Can you provide detailed information on the topic?	article_before_uncountable	Article
The engineer ordered a specialised equipment for the project.	The engineer ordered specialised equipment for the project.	article_before_uncountable	Article
We are waiting for a better equipment to arrive.	We are waiting for better equipment to arrive.	article_before_uncountable	Article
He showed a remarkable progress in just three months.	He showed remarkable progress in just three months.	article_before_uncountable	Article
We are proud of a significant progress she has made.	We are proud of the significant progress she has made.	article_before_uncountable	Article
She picked up a lovely furniture at the antique market.	She picked up lovely furniture at the antique market.	article_before_uncountable	Article
The office has a brand new furniture after the renovation.	The office has brand new furniture after the renovation.	article_before_uncountable	Article
I heard a wonderful music coming from upstairs.	I heard wonderful music coming from upstairs.	article_before_uncountable	Article
They played a lively music at the street festival.	They played lively music at the street festival.	article_before_uncountable	Article
He was caught in a slow traffic for two hours.	He was caught in slow traffic for two hours.	article_before_uncountable	Article
There is a constant traffic outside our building.	There is constant traffic outside our building.	article_before_uncountable	Article
She has a deep knowledge of ancient Greek philosophy.	She has deep knowledge of ancient Greek philosophy.	article_before_uncountable	Article
His technical knowledge makes him an expert in the field.	His technical knowledge makes him an expert in the field.	article_before_uncountable	Article
We need a reliable information before making a decision.	We need reliable information before making a decision.	article_before_uncountable	Article
She found an interesting information about the case online.	She found interesting information about the case online.	article_before_uncountable	Article
Could you give me an honest advice about my plan?	Could you give me some honest advice about my plan?	article_before_uncountable	Article
I just need a small advice to get started.	I just need a little advice to get started.	article_before_uncountable	Article
He is doing a research on the effects of social media.	He is doing research on the effects of social media.	article_before_uncountable	Article
They published a groundbreaking research on genetics.	They published groundbreaking research on genetics.	article_before_uncountable	Article
She carried a heavy luggage all the way from the taxi.	She carried heavy luggage all the way from the taxi.	article_before_uncountable	Article
He managed to fit everything into a single luggage.	He managed to fit everything into a single piece of luggage.	article_before_uncountable	Article

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GEC Targeted Corrections — ESL

An LLM-generated grammatical error correction (GEC) dataset targeting the specific error patterns that ESL learners most commonly produce. Each example is a (src, tgt) pair where src contains a realistic grammatical error and tgt is the minimally corrected version: only what is necessary is changed.

Dataset Summary

Split	Examples
train	2,037

Schema

{
  "src": "She gave me some advices about the interview.",
  "tgt": "She gave me some advice about the interview.",
  "pattern_id": "mass_noun_homeworks",
  "category": "Noun Number"
}

Field	Description
`src`	Sentence containing a grammatical error
`tgt`	Minimally corrected version of `src`
`pattern_id`	Identifier for the specific error pattern
`category`	Broader error category

Error Patterns

The dataset covers 20 targeted error patterns across 15 categories:

Category	Pattern ID	Description	Examples
Noun Number	`mass_noun_homeworks`	Uncountable nouns used as countable (homeworks, advices, informations, furnitures, equipments)	101
Article	`article_before_uncountable`	Indefinite article before uncountable nouns (a useful advice, a good information)	102
Double Negative	`double_negative_both`	Both negative pronouns need fixing (nothing→anything AND nobody→anybody)	102
Word Form	`adverb_fastly`	Non-existent adverb fastly instead of fast or quickly	102
Tense	`impossible_tense`	Past tense with future time expressions (she went tomorrow)	101
Tense	`complex_tense_reconstruction`	Past perfect continuous required (since many months → for many months + had been doing)	102
Collocation	`collocation_do_make`	do/make confusion (make a research → do research, do a mistake → make a mistake)	102
Collocation	`collocation_redundancy`	Redundant expressions (return back, repeat again, end result, past history)	102
Gerund/Infinitive	`gerund_vs_infinitive`	Verbs requiring gerund used with infinitive (enjoy to swim → enjoy swimming)	101
Gerund/Infinitive	`infinitive_vs_gerund`	Verbs requiring infinitive used with gerund (want doing → want to do)	102
Conditional	`conditional_type2`	Type 2 conditional: If I would have → If I had	102
Conditional	`conditional_type3`	Type 3 conditional: If I would have known → If I had known	102
Passive Voice	`passive_irregular`	Irregular past participles in passive (was wrote → was written, was build → was built)	102
Pronoun	`reflexive_pronoun`	Missing or wrong reflexive pronoun (he hurt him → himself)	102
Pronoun	`pronoun_case`	Wrong pronoun case (between you and I → me, her and I went → she and I)	102
Subject	`missing_it_subject`	Missing expletive it subject (Is very important → It is very important)	102
Comparative	`double_comparative`	Double comparative/superlative (more better → better, most fastest → fastest)	102
Preposition	`since_vs_for`	Since used with duration instead of for (since three years → for three years)	102
Vocabulary	`bring_vs_take`	Bring/take confusion based on direction of movement	102
Overcorrection Prevention	`no_change_needed`	Grammatically correct sentences that should not be changed	102

Design Principles

Minimal correction: tgt changes only what is grammatically necessary. No paraphrasing or stylistic edits.
Overcorrection prevention: The no_change_needed pattern includes correct sentences to discourage the model from changing things that are already right.
Diversity: Sentences span a wide range of topics (work, travel, health, family, sport, technology) and sentence structures to prevent overfitting to surface patterns.
ESL-realistic: All errors reflect patterns documented in ESL learner corpora rather than synthetic noise.

Usage

from datasets import load_dataset

ds = load_dataset("martinsr/gec-targeted-corrections-esl")

# Filter to a specific pattern
conditional = ds["train"].filter(lambda x: x["category"] == "Conditional")

# Use src/tgt for seq2seq training
for example in ds["train"]:
    print(example["src"], "→", example["tgt"])

Intended Use

Fine-tuning sequence-to-sequence models (T5, BART, mT5) for grammatical error correction
Targeted evaluation of GEC models on specific error types
Data augmentation alongside larger corpora such as FCE, W&I+LOCNESS, or NUCLE

Limitations

English only
Covers 20 specific patterns; not a general-purpose GEC corpus
Sentences are authored rather than collected from real learner writing

License

MIT

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