That isn't my jacket.

= That is not my jacket.


祝你学习进步,更上一层楼! (*^__^*)
不明白的再问哟,请及时采纳,多谢!Icanfindthekey 改为否定句I can't find the key.Iknow yourfamilyname 改为否定句I don't know your family name.