初中英语人教版七年级下册Unit4 Section A 2a-2d.ppt

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1、Unit4Don'teatinclass!SectionA2a-2dTolearnimperatives(Don’t...).Tolearntousecanforpermission.Tolearntousemodelverbshaveto,can,must.PartIWords&ExpressionsPartIIGrammarFocusPartIIIExercisesPartI:Words&ExpressionsWordsExpressionsoutsideadv.在外面adj.外面的wearv.穿；戴importantadj.

2、重要的bringv.带来；取来haveto必须；不得不quietadj.安静的PartII:GrammarFocusKeystructures:---Whataretherules?—Wemustbeontimeforclass—---Canweeatintheclassroom?—No,wecan’t,butwecaneatinthedininghall.—Canwewearahatinclass?—Yes,wecan./No,wecan’t.---Doeshehavetowearauniformatschool?—Yes,he

3、does./No,hedoesn’tKeypoints：haveto的用法1.肯定句：主语+haveto+动词原形+其他注意：一般现在时：主语是第三人称单数时用hasto，其它时候用haveto（过去时：无论人称和单复数都用hadto.）(1)Wehavetowearsportsshoesforgymclass.在体育课上我们必须穿运动鞋。(2)Tomhastopracticetheguitareveryday.汤姆每天必须练习弹吉它。(3)Ihadtogetupat5:00amlastMonday.上周一我不得不早上5点起床。2

4、.否定句:主语+don’thaveto+动词原形+其他。一般现在时:主语是第三人称单数时用doesn’thaveto,其它时候用don’thaveto。(过去时:无论人称和单复数都用didn’thaveto)(1)Nickdoesn’thavetowearauniform.尼克不必穿制服。(2)Wedidn’thavetodoourhomeworkatonce.我们不必马上完成作业。3.疑问句：Do/Does/Did+主语+haveto+动词原形+其他(1)—Doyouhavetostayathomeonweekends?—Yes

5、,Ido./No,Idon’t.(2)Didhehavetogotobedby11:00lastnight?PartIIIExercises一、单项选择—_____doyouhavetodoafterschool?—Domyhomework,ofcourse.A.WhatB.WhenC.WhereD.How二、句型转换1.Wehavetostayathome.(改为一般疑问句)________you________tostayathome?2.Bobhastogethomebeforenineo’clock.(改为否定句)Bob_

6、_______________________gethomebeforenineo’clock.三、选择正确的动词填空。1.(Can/Does)______weeatinclass?2.(Don’t/Hasto)________wearahattoschool!3.DoesBill(haveto/can)__________gotobednow?4.(Do/Haveto)______theywearuniforms?Thankyou!