Multiple choice Directions: Change the voice of the given sentence. Can you solve this problem? Could this problem be solved by you? Can this problem be solved by you? Can this be solved the problem by you? Can it be solved by you the problem? Reveal answer Fill a bubble to check yourself B Correct answer Explanation Case of interrogative sentence in present indefinite tense. While changing the voice, we do not change the modal. In passive voice we use the past participle for of the verb.