Unit 9 Can you come to my party ？【重要词汇概览】 lesson n. 课，课程 calendar n. 日历，行事历 tomorrow n. 明天 invitation n. 邀请【重要词组概览】 the day after tomorrow 后天 go to the doctor去看病 have a piano lesson 上钢琴课 have to不得不 text time下一次 study for a test准备考试【语法知识聚焦】 1. have to 与情态动词的区别 情态动词不能单独作谓语，后面必须接动词原形一起构成谓语，have to 也是这样。 情态动词没有人称和数的变化，而且所用的时态也受到一定的限制，但是have to 有人称和数的变化，可用于多种时态中，在一般现在时中，当主语是第三人称单数时，要用has to, 其余人称用have to；一般过去时中用had to；一般将来时中用will have to, 例如： She has to go to school by bus. 她不得不乘公共汽车去上学。 If you get ill, youll have to see the doctor. 如果你生病的话，你就得看医生。2. have to 与must 的区别 have to 和must 都有“必须”的意思，那么它们 有哪些不同呢？(1) 含义和用法上的区别： have to 强调客观上需要做某事，即表示外界条件的需要不得不做某事，含有“形势逼迫”的意味；must 强调说话者主观上认为必须做某事，含有“主观判断”的意味， 例如： My bike was broken on my way to school. I had to walk there. 我的自行车在上学的路上坏了，我不得不走路去上学。（我本来不愿意走路，可是自行车坏了，不想走路也不行。） We must learn English well. 我们必须学好英语。（主观上有这种想法。）(2) 否定式的区别： have to 的否定式意为“不必”，must的否定式意为“禁止；不允许”。因此，以must开头的一般疑问句的肯定回答为“Yes, 主语+must”，否定回答为“No, 主语+neednt / dont have to”。例如：-Must I finish the homework now? 我必须现在完成作业吗？-Yes, you must. (No, you neednt / dont have to) 是的，你必须现在完成。（不，你不必。）3. 反意疑问句的构成区别：(1) 陈述部分含有have to 时，其附加问句的谓语往往用助动词do的相应形式或助动词will。例如：You had to go shopping yesterday, didnt you?昨天你不得不去购物，是吗？(2) 陈述部分含有must 时，其附加问句的谓语，按下面几种情况来确定：A. must 意为“必须”时，附加问句谓语用neednt。例如： We must clean the room, neednt we? 我们必须打扫房间，是吗？B. mustnt意为“禁止”之意，附加问句谓语用must。例如： The boy mustnt play with the knife, must he? 那个男孩不能玩刀子，对吗？C. must 意为“应该”时，附加问句谓语用mustnt。例如： We must help each other, mustnt we? 我们应该互相帮助，对吗？D. must 意为“一定；想必”表示推测时，附加问句部分谓语要根据must后面的动词来 确定。例如： Mr Wang must be at home, isnt he? 王先生一定在家，对吗？ 注：must 表示的是一种相当肯定的与事实非常接近的推测。例如： Mr Wang must be at home. 其实就相当于Mr Wang is at home. 因此，它的反意疑问句的附加问句部分是isnt he 也就很容易理解了。 又如：They must be right, arent they?【综合能力检测】一. 单项填空1. What do you usually do _ Saturdays?( ) A. at B. on C. in2. Im sorry I have to _ for the English test.( ) A. studyB. studiesC. studying3. Can you _ to my birthday party?( ) A. visitB. go C. come4. Thanks for _.( ) A. asking B. ask C. asks5. On Wednesday , Im _ tennis with the school team.( ) A. play B. playingC. am playing6. A: Must I clean my room, mom? B: No, you _.( ) A. dontB. needntC. arent二. 连词成句 1. Thanks, for, a lot, invitation , the _2. Can, come, to, you , my , party ? _3. Im , Im , sorry , to , going , the , movies, my friends, with . _4. Tomorrow , have to , I , to , the , go , dentist. _5. What , you, are , on , Sunday, doing? _三. 根据所给词语的提示，写出问句和答句1. does go school how Lucy to? (ride her bike) Q: _ A: _2. you how do get house your? (walk) Q: _ A: _3. it long take how does? (twenty minutes) Q: _ A: _4. far it his home is how from school to? (five miles) Q: _ A: _四. 补全对话A: Hi, Tom?T: Yeah, hi, Amy.A: Tom, can you 1 tennis with me?T: Uh, 2 ?A: Today.T: Uh, no, sorry, I cant. I have to go to the doctor and 3 for a test today.A: How about 4 ?T: Sorry, tomorrow Im playing soccer and I have a piano lesson.A: Oh. Well, what are you doing the day after tomorrow?T: I have 5 babysit my sister.A: Oh, I see.T: Im sorry, Amy. Im really busy this week.五. 重新安排所给句子的顺序，使其成为一个完整的信件。A. Dear Ms Masini,B. yours sincerely A. SpringfieldC. We usually try to arrange such visits on Fridays,D. are 21st May and 4th June.E. if one of these is suitable for you?F. In view of your interest in the Institute for the BlindG. for you to spend a morningH. Could you please let us knowI. Thank you for your letter of 12th April.J. visiting our organization,K. because one of our staff is then free to show guests round the buildings.L. Two possible dates which we can offerM. we are extremely happy. 【参考答案点拨】一、1. B 2. A 3. C 4. A 5. B 6. B1. B, 表示在星期几，用介词 on