谁会这道题：I heard him ________

谁会这道题：I heard him ________ I heard him ________ every night. [     i haven't heard from him recently. I heard him singing改为被动语态 I have never heard of him,_____ ? I've never heard of him before. I have heard him. about you often 谁会这道题：— Have you heard to .I heard somebody playing ________ piano in ________ next ro I heard him singing there改被动句是heard singing还是heard to sing thought I didn't hear [ ],I heard [ ] him .When I passed by his door,I heard him _____________.