I .She is a teacher .Is she a teacher?Yes,she is .No,she isn't.I like red.Do you like red?Yes,I do.No,I don't.You have three rulers.Do you have three rulers?Yes ,I do.No,I don't.是各个句子都改成肯定回答否定回答和一般疑问句是的。三个句子分别变成这三种形式