No,not tonight 不,不要今晚。
I love to, but I have to work 我很乐意,但是我必须工作。
Thans for the invitation, but I have other plans 谢谢你的邀请,但是我有其它计划。
I'll have to pass 我必须通过。
Words and phrasesappointment约会, pass通过, grill烧烤, burger汉堡包. invitation邀请, plan计划