2、可以说I‘msorry.I’mafraidnot,because...等等。-Shall we go to the museumtomorrow?我们去博物馆,好吗?-Sure.Certainly.Definitely.好啊!当然可以了。I’msorry.I’mafraidnot,becauseIhavetodomyhomeworktomorrow.对不起,我恐怕不能和你一起去了,我明天要写家庭作业。AskandanswerShallwe...thisweekend?sure.dohomeworkShallwedohom