Those are his grandparents.怎么变为一般疑问句并作否定回答?

these,those,brothers,sisters,and,his,are,his,are Are those his friends?改为单数形式 Are those his toys?(否定回答) Those are his parents改同义句 Those are his parents.（单数） those are his sistexs 改为单数句 friends.his.are.those连成一句话 those are his brothers 改为单数形式 什么 his 什么 Those are his trousers.(对his trousers提问） those are his T-shirt.划线部分提问!Those are his T-shirts.（his）Those T-shirts are his.(his)Those are his T-shirts.(his T-shirts)She plays computer often.(she)要用who和whose are those开头的疑问句回答怎么写Are those his friends？回答怎么写 Those are his friends.(否定句,疑问句并做回答) Those are his parents怎么改为否定句 those,are.his.boxes改成单数,怎么改 Those are his parents (对画线部分提问) Are those dogs his?No,they don't.【改错】 Those are his pens,翻译成单数句 are,those,parents,not,his能组成一句话吗