1.This is my book.2.That is her father.改成否定句、一般疑问句还有肯定、否定回答.

This is not my book. Is this your book? Yes ,it is . No ,it isn't That is not her father . Is that her father ? yes ,he is . No ,he isn't

this isnt my book
is this my book?
yes this is /no this isnt

否定句：①This isn't my book.
②That isn't her father.
疑问句：①Is that your book? - Yes, it is./ No, it isn't.
②Is that her father? - Yes, he is./ No, he isn't.

否：This isn't my book.
That isn't her father.
疑：Is that your book? - Yes, it is./ No, it isn't.
Is that her father? - Yes, he is./ No, he isn't.

否定句This is not my book.
一般疑问句is this my book?
肯定yes it is
否定回答no it is not
对于第二个跟第一个一样就是回答不大一样
肯定yes he is
否定回答no he is not