Final answer:
The sentence 'After mopping the floor, the house was ready for guests' contains a dangling modifier (DM) because it incorrectly suggests that the house did the mopping. To correct this, the sentence should include the doer of the action or rephrase the sentence to clarify who or what is performing the action of mopping.
Step-by-step explanation:
The error in the sentence 'After mopping the floor, the house was ready for guests' is a dangling modifier (DM). A dangling modifier is a word or phrase that modifies a word not clearly stated in the sentence. The modifier 'After mopping the floor' seems to suggest that the house did the mopping, which is illogical.
To correct this error involving a mixed sentence structure, the sentence needs to be rewritten to include the doer of the mopping action. The correct version of the sentence might be: 'After we finished mopping the floor, the house was ready for guests,' or 'The house was ready for guests after the floor had been mopped.'
Remember that modifiers should be placed near the word or words they are modifying to ensure that the meaning of the sentence is clear. When reviewing and revising sentences, always check for instances of misplaced, squinting, dangling modifiers, and faulty parallelism to enhance clarity and coherence in writing.