“To raise a good dog, patience is useful.” This sentence makes it sound like patience is raising the dog when it is a person who is raising the dog.
• A couple of examples of sentences with dangling modifiers include, “While eating his dog food, dad noticed Spot seemed hungry.”
• This structure makes it sound like the dad is eating the dog food, rather than the dog.
• Another one is, “Having completed his work, Brad put on his music.”
• Having completed states an action, but it doesn’t say who is performing the action.
• All of these sentences are dangling modifiers.
• A dangling modifier makes the meaning of the sentence unclear.
• It is misplaced because it does not have anything to modify or modifies the wrong subject.