按要求完成句子。
1.coat is Whose this (?) (连词成句)
_______________________________________
2.Is this your sweater? (作否定回答)
___________, ___________ ___________.
3.Is this your coat? (作肯定回答)
___________, ___________ ___________.
4.My coat ___________ ___________(是绿色的).(根据中文提示完成句子)