My sister is going to buy a hat (变为否定句)

my sister is going to japan tomorrow对tomorrow提问 buy sister to a going is dictionary my排列句子 I with my sister _ to the park.A.is going B.are going C.am going D.be going my sister is going to see a play this weekend.改为一般疑问句[ ] [ ] sister going to [ ] a play this weekend？ My sister is going to leave at six tomorrow.(对at six tomorrow提问 __ __your sister going to leave? My mother is going buy toys ___ my sister .（to还是for)///要解释~ my sister is going to ___ ____ for her best friend.(画一张画)my sister is going to ___ ____ for her best friend.(画一张画) My sister is shorter than my brother.同义句My sister isn't _______ _______ _______ my brother. she is my sister. My sister is a my sister is a My sister is a my sister is my sister is my sister is zhangjing is my sister. don't like my sister's going to such a place.这里sister为什么要用名词所有格呢? 是I with my sister is going to go out for a picnic对还是I with my sister am going to go out for a picnic对?