把句子改为否定句:My tail is long.

把句子改为否定句:My tail is long. my tail is short 改为否定句 My tail is long.(改为否定句） 把句子改为一般疑问句：My tail is long. 把He is my teacher.改为否定句 The elephant's tail is long and thin(改为否定句意思不变） That is my notebook.(改为否定句) this is my friend.(改为否定句) This is my grandmother.改为否定句 This is my father()改为否定句 She is my sister.改为否定句 This is my room 改为否定句 she is my friend 改为否定句 That is my brother.改为否定句 That is my uncle.改为否定句 This is my ruler (改为否定句) This is my siste 改为否定句 she is my sister.改为否定句.