why not( )(have) a party this week?

why not( )(have) a party this week? Why not _____a party this week?（后加have原形、to do形式、还是doing形式? Why not have a party?同义句 why not have a party 同义句 Why not have a party 改为同义句 Why not have a party for her 同义句 why not have a party?改为同义句 六个空 Why not have a party?(改为同义句） _____ _____ having a party? Why not have a party?—— —— —— a party? We will have a party ____ this week,but they will have one _ We ____(have)a party last week. They are busy _ this week.They _ very tired.Why not _ a rest