The document discusses dangling modifiers, which occur when a word or phrase that is intended to modify something is separated from the thing it is intended to modify, making it unclear what is being modified. This can happen when a participial phrase or clause at the beginning of a sentence does not clearly refer to the subject of the main clause. Some examples are provided and strategies discussed for revising sentences with dangling modifiers, such as naming the appropriate doer of the action as the subject or combining the modifier into the main clause.