Read the excerpt our hero these lines prive the reader with

type of error:

the error in the sentence is a "dangling modifier". a dangling modifier is a phrase, word or clause that "dangles" because there is not target to modify. in this case, "after mopping the floor" is the dangling modifier since it has no word to modify. the noun "house" cannot mop the floor; therefore there is a mistake in the writing of the sentence.

awnser: william shakespeare was an english poet, playwright, and actor, widely regarded as the greatest writer in the english language and the world's pre-eminent dramatist.