is that his key (改为复数形式)

is that his key (改为复数形式) This is his ruler(改为复数句) That is my key(改为复数句) These are his brother this is his key 改为一般疑问句 That is his key...否定句That is his key...否定句：还有一般疑问句：回答： that is her key.that key＿＿ ＿＿.(改为同义句) That is her key 改为同义句怎么改啊 连词成句 is ,thst ,man ,who ) 句型转换 That is my key.（改为否定句） That ( ) ( ) my key. that is his brother 改为复数句 that is his pencil改为复数句 that is his sister改为复数形式 That is his eraser改为一般疑问句 That is his friend.改为复数句 that football is his改为一般疑问句 that is his jacket 改为否定句 that is his dictionary 改为同义句 That book is his?改为复数形式 is that his pen?改为复数 That apple is his.(改为复数)