Sentence Structure:
* Run-on sentences: Sentences that continue without proper punctuation or conjunctions. Example: "I went to the store I bought some milk and bread I came home."
* Sentence fragments: Incomplete sentences that lack a subject or a verb. Example: "Running through the park."
* Incorrect punctuation: Missing commas, misplaced periods, improper use of semicolons, etc.
* Misplaced modifiers: Phrases that modify the wrong element of a sentence. Example: "I saw a dog running down the street with a long tail."
Word Choice:
* Incorrect word usage: Using the wrong word for a specific context. Example: "I feel bad for you, your car looks like it's seen better days." (Should be "badly" instead of "bad")
* Unnecessary words: Using extra words that don't add meaning. Example: "I went to the store for the purpose of buying milk." (Should be "I went to the store to buy milk.")
* Clichés and informal language: Using overused phrases or informal language that isn't appropriate for the context.
* Misspelled words: This can be a sign of poor grammar, but can also just be a typo.
Other:
* Lack of subject-verb agreement: The verb should agree in number with its subject. Example: "The dogs are barking." (Not "The dogs is barking.")
* Pronoun agreement: Pronouns should refer to the correct noun. Example: "The dog wagged its tail." (Not "The dog wagged his tail.")
* Confusing homophones: Words that sound the same but have different meanings. Example: "Your" vs. "You're," "there" vs. "their" vs. "they're."
* Incorrect tense usage: Using the wrong verb tense for the context. Example: "I will go to the store yesterday." (Should be "I went to the store yesterday.")
* Awkward sentence structure: Sentences that are difficult to understand or read due to poor structure.
Overall, it's important to note that even though these signs indicate potential grammatical errors, they don't always guarantee a text is incorrect. Context is key, and there are instances where these "errors" may be intentional or used for stylistic purposes.
It's always helpful to consider the intended audience and purpose of the text when evaluating its grammatical correctness.