TranslatethefollowingintoEnglish,usingthegivenmodalauxiliaries:他也许在做家庭作业。(may)

TranslatethefollowingintoEnglish,usingthegivenmodalauxiliaries: 你如果改变主意，请告诉我。(should)

TranslatethefollowingintoEnglish,usingthegivenmodalauxiliaries: 假如明天下雨，足球赛将延期举行。(should)