What are the most common English grammar errors?

Some of the most common English grammar errors include:

1. Subject-Verb Agreement: Errors in matching singular/plural subjects with corresponding verbs (e.g., "He walk" instead of "He walks").

2. Misplaced or Dangling Modifiers: Modifiers that are not correctly placed near the word they modify, leading to confusion (e.g., "Running quickly, the dog was caught" instead of "The dog, running quickly, was caught").

3. Pronoun Errors: Incorrect use of pronouns or mismatching pronouns with their antecedents (e.g., "Everyone must bring their book" instead of "Everyone must bring his or her book").

4. Apostrophe Misuse: Confusion between possessive forms and contractions (e.g., "it's" instead of "its," or "apple's" instead of "apples").

5. Run-on Sentences and Fragments: Joining independent clauses without proper punctuation or separating incomplete thoughts as sentences.

6. Comma Splices and Misuse: Incorrect use of commas to connect independent clauses without a coordinating conjunction or using them excessively.

7. Confusing Homophones: Words that sound alike but have different meanings or spellings (e.g., their/there/they're, your/you're, its/it's).

8. Double Negatives: Using two negative words in a sentence that cancel each other out (e.g., "I don't want nothing" instead of "I don't want anything").

9. Confusing Comparative and Superlative Forms: Misusing comparative (-er) and superlative (-est) forms of adjectives (e.g., "more better" instead of "better" or "best").

10. Confusing Prepositions: Misusing prepositions in sentences, affecting the meaning (e.g., "I'm good in playing soccer" instead of "I'm good at playing soccer").