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Unit12Whataretherules?Whataretherules?Whataretherules?Whataretherules?Whataretherules?Whataretherules?Whataretherules?Don’t….PairworkWhataretheotherrules?--Canwe…..?--Yes,wecan./No,wecan’t.Wehaveto….Yes,wedo.Doyouhavetowearyourschoolcardonweekends?Yes,wedo.Doyouhavetowearshortsforgymclass?Yes,wedo.Yes,wedo.Doyouhavetocleantheclassroomonvacation?Yes,wedo.Yes,wedo.1.haveto的意思是“必须、不得不”。(1)结构:主语+haveto+动词原形(一般现在时,主语是第三人称单数时,用hasto;句子是过去时,用hadto)Wehavetowearsportsshoesforgymclass.在体育课上,我们必须穿运动鞋。Tomhastopracticetheguitareveryday.汤姆每天必须练习弹吉它。Ihadtogetupat5:00a.m.lastMonday.上周一我不得不早上5点起床。(2)否定形式:主语+don’thaveto+动词原形(一般现在时,主语是第三人称单数时用doesn’thaveto;一般过去时,任何主语都用didn’thaveto)(3)疑问句:do(does/did)+主语+haveto+动词原形+?Fillintheblankswiththecorrectwordsinthebox.--Dowehaveto…?YesorNo?1.A:Whatdoyouhavetodoatschool?B:Ihaveto….4Howcanyoubeagoodstudent?Goodbye