Grammar Error Correction Generator

A red underline tells you something's wrong. It doesn't tell you why, and a learner who fixes the same mistake five times without ever learning the underlying rule just keeps making it in every sentence the underline didn't catch. This tool corrects what you actually wrote, in your own words, and explains the grammar behind every fix so the correction transfers to the next sentence instead of staying stuck to this one.

My sentence or sentences are [MY_SENTENCES].

Language is [LANGUAGE:select:Spanish,French,German,Portuguese,Russian].

Level is [LEVEL:select:A1 (beginner),A2 (elementary),B1 (intermediate),B2 (upper intermediate),C1 (advanced)].

Correct [MY_SENTENCES] in [LANGUAGE], preserving the original meaning and intent rather than rewriting into a different sentence entirely. For each error found, quote the exact phrase that's wrong, give the corrected version, and name the specific rule it broke, gender or case agreement, wrong preposition after a verb, a tense or aspect that doesn't fit the context, word order carried over from English, or anything else concrete rather than a vague "grammar issue."

Group corrections by type if more than one error shares the same root cause, since seeing three separate mistakes that all trace back to one misunderstood rule teaches that rule faster than three isolated fixes would. Leave anything that's already correct alone, don't invent a stylistic tweak just to have more to say. Close by naming the single error type in this set most likely to recur in future writing, based on what actually shows up here, not a generic warning.