Sentence fragments: these are many words that together seem to be sentences, but are not. For this to be possible, such words must have at least one independent clause (a clause that contains a subject and verb).
Run-on: a sentence that is gramatically incorrect, where there is a join of two or more principal independent clauses and the element that separates them is missing. It can be a connector or punctuation mark which makes the whole idea coherent.
Misplaced or Dangling modifier: it is a word or clause that is incorrectly separated from the word it alters, wether by modification or description. Due to this mistake, clauses often sound confusing, funny or disconcerting. For example, a writer's intention may have been to modify the subject, but the organization of words makes the reader interpret that the object is modified instead.
In a sentence, using components that are grammatically equivalent or alike in their structure, sound, sense, or meter is called as parallelism.
Three writing techniques that lead to errors in parallel structure are:
- Mismatching words in a list
- Conjunctions that are not coordinated
- Misuse of "Than/As" in comparative or contrasting structures