This is a blue backpack.(否定句) this————— ———————— blue backpack.

This is a blue jacket.And that ruler is bThis is a blue jacket.And that ruler is blue.为什么要用a blue和blue? This is a chance once in a blue moon, is cap this a blue.连词成句 This is a blue sweater复数形式fkdkkkkkkk This is a blue sweater.（同义句转换） this is a blue backpack改为一般疑问句 This is a blue backpack改为同义句 是This is my blue pen 还是This is my a blue pen有助于回答者给出准确的答案 英语17.-The green typewriter is mine.17.-The green typewriter is mine.-Do you know whose typewriter ________?A.is the blue one B.this blue one C.it is this blue one D.this blue one is为什么? This is my blue pen.(改为一般疑问句）()this () blue pen?This is a white key.(对划线部分提问)()()this? 英语71.-The green typewriter is mine.71.-The green typewriter is mine.-Do you know whose typewriter ____?A.is the blue one B.this blue one C.it is the blue one D.this blue one is为什么 This is ablue backpack.(改错为否定句)This a blue backpack.咋填 修改病句 This is a pen.The pen is a blue. This is a ruler._____ ruler is blue中____应填写The,还是A? This blue cap is mine.( 对blue提问) This is ______ jacket.blue memy blueblue mythe my blue 英语选择：This is a__ hat.选项：A.yellow big B.yellow small C.blue big D.small blue i have( )clothes here .( )are they here is a blue shirt .is this ( ),li ming?