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

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 my pen is blue ; my friends is 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? This is my pen.(变为复数句）My pens are blue.blue 是划线的 （就划线部分提问）This is my pen.(变为复数句）My pens are blue.blue 是划线的 （就划线部分提问）是不是 These is my pens .和 What are your color pens . 英语句型转换 This is my blue pen.改为一般疑问句 this is a my pen my pen is blue my friend is you is this your pen blue可以这样问吗你的笔是蓝色的吗 为什么说This is my a pen是错的? This pen is (blue)对画线的部分提问 This is not my pen.M______ is My pen is blue.怎样改成一般疑问句 My pen is blue.(改为否定句） 如何提问The blue pen is my favourite one 修改病句 This is a pen.The pen is a blue. This is my a pen?对还是This is a my pen?对This is my pen？ This blue bag is ______ my mother. This litter is ( )my pen friend Tony