this is pen?怎么改成一般疑问句

this is pen?怎么改成一般疑问句 this is a pen改成一般疑问句 This is a pen ,That is her book怎么改成否定句 These are my sisters怎麼改成疑问和否定句 The pen is red改成一般疑问句怎么改 the pen is black it´s a black pen my.jacket isthe pen is blackit´s a black pen my.jacket is yellow this is a quit that is a cup in english these jacket are.brown 必纳才 改成一般疑问据 that is a pen.改成一般疑问句 My is black pen改成一般疑问句? Is this his pen 改成同义句 This pen is his改成同义句 This is his pen 改成一般疑问句 并做出肯定和否定两种回答 This pen is mine.改成否定句,一般疑问句,肯定回答,否定回答 the pen is in the pencilbox.改成否定和疑问 thae is my pen.that is his desk.this is her pen-case.that is your eraser.改成一般疑问句并做回答 This is a pen.改为一般疑问句 this is my pen.改一般疑问句 Tony's pen pal is froru America该怎么改成一般疑问句 This dress is good.改成一般疑问句怎么该 This dress is good.改成一般疑问句怎么该