It is his pen(改为一般疑问句)

It is his pen(改为一般疑问句) it is his pen改为肯定句 it is a pen(改为一般疑问句) this is his green pen 改为一般疑问句 those are her keys 改为一般疑问句 She likes singing .(一般疑问句） My brother is clever.(一般疑问句） He can find his pen..(一般疑问 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 is that his pen?改为复数 His pen is dlue改为否定句 This is a pen.改为一般疑问句 The pen is cheap改为一般疑问句 The pen is cheap.【改为一般疑问句】 It is my pen.(改为复数形式) Is it a pen?改为肯定句 that is his bag 一般疑问 john is watching his classmeats一般疑问 His pen pal lives in Sydney . 改为一般疑问句 It is a pen.改为否定句,并作肯定回答.改为一般疑问句,并作否定回答 1.Is that his pen?(改为复数) 2.She is my good friend.（改为一般疑问句）3.That is Cheng Long.（改为一般疑问句） 4.lt is Dave.（改为一般疑问句）