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1、Unit 9Can you come to my party?,Section A(2a-2c),Listen to the song ! And tell me if you can come to my party?,Can you come to my party?,Jeff can / cant come to the party.Mary can / cant come to the party.May can / cant come to the party.Claudia can / cant come to the party.Paul can / cant come to t
2、he party.,2,3,1,Jeff,May,Claudia,Explanation,1. 情态动词“ have to”与其他的情态动词如： “ can” , “may” “must”和 “ should” 不同。 （1）这4个情态动词没有人称的变化,而have to有。它的第三人称单数为“has to” 如：,He should study hard . 他应该好好学习。 He has to study hard . 他不得不好好学习。,（2）这4个情态动词在一般疑问句中将它们放在句首, 在否定句中直接在它们后边加not即可。,我们以can为例: Can he go with us ?
3、他能和我们一起去吗？ He cant go with us . 他不能和我们一起去。 而“ have to”要加助动词do , does或did才可能完成其疑问、否定句。,试将下面三句话分别写成 （1）一般疑问句，并做肯定回答。 （2）否定句。 1: They have to go to the party . Do they have to go to the party ? Yes , they do . They dont have to go to the party.,2. He has to go to see the doctor . Does he have to go to
4、see the doctor? Yes , he does . He doesnt have to go to see the doctor .,3. She had to have a piano lesson yesterday. Did she have to have a piano lesson yesterday? Yes, she did . She didnt have to have a piano lesson yesterday.,3.Thats too bad . Maybe another time . 太糟了，也许换个时间吧。 或Maybe next time .
5、也许下一次吧。,2. I have to help my parents . 我不得不帮助我的父母。 help sb. with sth .或help sb (to) do sth . 上一句我们可以说： I have to help my parents with the housework . 或说I have to help my parents (to) do the housework .,2c PAIRWORK,Hey, Bush, can you go to the movies on Saturday?,Im sorry, I cant. I have too much homework this weekend.,Thats too bad. Maybe another time.,Sure, Joe. Thanks for asking.,Homework Do a survey:Zhang Qing is having a birthday party this Sunday afternoon ,invite some classmates to the party ,and finish the chart, If he or she cant, ask reason.,Thank you for listening,BYE,