i dont know who the watch belongs to请帮忙分析以下句型,.还有为什么watch后面就只有 belongs to

who are the two__(act) Dorry,i dont know. i dont know who am i i dont know who you are i dont know who is the boy & i dont know who the boy is which one is correct Please give detailed explaination ,thank you very much . I DONT KNOW THE PERSON WHO IS STANDING UNDER THE BIG TREE改为同义句 The door is open.Who ____(open)it?Sorry,I dont't know.为什么? i dont know who i am without you中文意思 Who care.I dont i dont know f why?I dont know! i dont know her “i dont know chinese ” My lovers dont know what is pub.I dont know how to explain.Who can help me?thank u. I dont know the 什么 .you may ask the policeman 找一首英文歌中间有很多oh oh oh oh,i gotta tell you...you dont know my name...i dont want to hideanymore...i am the girl who watch you through the window 英文歌I DONT KNOW WHY YAYA THE DREAM . Sorry,I dont know the way ,either.Im a s___here “I dont know !”是什么意思啊?