AI Grammar Checker for ESL Students
Hana is a Japanese student writing her first English academic essay. Her grammar is largely correct, but she omits articles (I went to library instead of I went to the library), uses the wrong prepositions (interested on instead of interested in), and writes sentences that are grammatically possible in English but structured like Japanese sentences. A standard grammar checker flags her comma usage but misses the patterns that actually mark her writing as non-native. The AI Grammar Checker for ESL students identifies L1-interference errors specifically (the patterns that transfer from the first language into English) and explains the English rule in contrast to the first-language pattern.
L1 errors
First-language interference detection
Articles
Definite and indefinite article coaching
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Academic vs. informal vocabulary check
How English language learners Use It
Grammar feedback calibrated to the conventions that matter for this audience.
L1-interference error identification: articles, prepositions, and sentence structure
The grammar errors most common in ESL writing are not random (they reflect patterns from the student's first language. Japanese, Chinese, Korean, and Arabic do not use articles (a, an, the) the same way English does) or at all. Russian and other Slavic languages have no definite article. Spanish and French have different preposition conventions from English. The AI Grammar Checker identifies article and preposition errors with explanations that reference the English rule directly rather than just flagging the error.
Subject-verb agreement for ESL writers: complex sentences and intervening phrases
Subject-verb agreement errors in ESL writing often appear in complex sentences where the subject and verb are separated by a clause or phrase. Many ESL students make agreement errors because the nearest noun is plural even when the grammatical subject is singular. The AI Grammar Checker identifies these errors in complex sentences and explains the rule with the specific sentence structure in question, not a generic example.
Academic register coaching: marking informal English for formal writing
ESL students often produce English that is grammatically correct but inappropriately informal for academic writing. Contractions are natural in spoken English but inappropriate in formal academic prose. Phrasal verbs are common in everyday English but marked as informal in academic writing. The AI identifies these register issues specifically for ESL writers, who often learn informal English from media and conversation rather than academic texts.
ESL Students Grammar, Frequently Asked Questions
Common questions from English language learners about using the AI Grammar Checker.
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