Mary is reading an English book改为否定句

Mary is reading an English book改为否定句 Micky is reading an interesting book.改为否定句 It is an English book(改为否定句） this is an english book(改为否定句）is该下 把She is reading a book.改为否定句 连词成句an,the,boy,book,reading,English,is is he reading an book English (.)连词成句 I have an English book.改为否定句 this is my English book.改为否定句 This is an English book(改为复数句） Is this an English book?改为复数句 this is an English book 改为复数句