If you stay up late tonight,I will be tired in the morning.If I am tired in the morning,I cannot focus on my study.If I cannot focus on my study,I will have a bad grade.If I have a bad grade,my parents will beat me up.If I get beaten up,I will look ugly.If I look ugly,my girlfriend will not date me anymore.If my girlfriend does not date me anymore,I will stay up late at night again.