This is my watch改为一般疑问句

This is my watch改为一般疑问句 This watch is his?(改为一般疑问句) This is my ruler.(改为一般疑问句) This is my uncle (改为一般疑问句) This is my sister.(改为一般疑问句) This is my school.改为一般疑问句 This is my cup.改为一般疑问句. This is my key.改为一般疑问句! This is my eraser 改为一般疑问句 This is my jacket.改为一般疑问句 This is my computer.改为一般疑问句 This is my chair.(改为一般疑问句)