is this your father?改为否定形式

This is my father()改为否定句 is this your father的否定回答 Is this your book?(改为否定句) Is this your friend?改为复数形式 This is your sister.改为复数形式 Is this your father (用YOUR uncle 改为选择疑问句) That is her father 改为否定句形式 Is this Mary's father 改为否定回答 This is my father.(改为否定句） I think your father is right.改为否定句. This is your father's notebook ? 改为陈述句 This is tom'S friend in america.改为复数形式 This is mary's father