1：is that his pen?改复数 2：she is my good friend.改为一1：is that his pen?改复数2：she is my good friend.改为一般疑问句3：that is Cheng Long改一般疑问句4：it's dave.改一般疑问句

1：is that his pen?改复数 2：she is my good friend.改为一1：is that his pen?改复数2：she is my good friend.改为一般疑问句3：that is Cheng Long改一般疑问句4：it's dave.改一般疑问句 that is n___ alan's pen.his pen is blue. that is his pen变复数句 that.is his pen哪错了 is that his pen?改为复数 Is __ your pen A.that B.this C.her D.his.That is his pen. I think it is his pen同义句I( )( )it ( )his pen.改否定句! That is his pen.(改为否定句） 连词成句：is that green pen his (.) that is his pen变一般疑问句并否定回答 Is __ your pen ?That is his pen. A.that B.this C.her D.his.可以告诉我为什么?谢谢 is that his a room?怎么改/ Is that his dictionary怎么改陈述句? that's his pen (对划线部分提问)对his提问（）（）is that=()()()() that is your pen. That is green pen that is a pen this is his pen.my is in the pencil box 哪里错了 怎么改