1.Are you working overtime tonight?

　　今晚你加班吗?

　　(也可以这样说：Are you working late tonight?)

　　2.Must you work overtime tomorrow?

　　明天你必须加班吗?

　　3.Will you have to work overtime this weekend?

　　你这个周末要加班吗?

　　4.Can you finish it today?

　　你今天能干完吗?