1、Unit 1 Festivals around the worldSection Grammar情态动词()语 境 自 主 领 悟 先观察原句Most ancient festivals would celebrate the end of cold weather,planting in spring and harvest in autumn.Some festivals are held to honour the dead or to satisfy the ancestors，who might return either to help or to do harm.For the
2、Japanese festival Obon，people should go to clean graves and light incense in memory of their ancestors.Festivals can also be held to honour famous people.语 境 自 主 领 悟 后自主感悟 以上四个句子都使用了动词。其中，句中的would表示过去习惯性动作，意为“”；句中的might表示推测，意为“”；句中的should表示劝告或建议，意为“”；句中的can表示许可，意为“”。情态过去常会可能会应该可以语 法 精 要 点 拨 一、基本特征1情
3、态动词有一定的词义，不能单独作谓语，需和实义动词或系动词一起作谓语。The idea that computers can recognize human voices surprises many people.电脑能识别人的声音，这种想法使很多人感到吃惊。They must be in the classroom.他们一定在教室里。2情态动词一般无人称和数的变化，个别情态动词有现在时和过去时两种时态变化。Mary can speak three languages.玛丽会说三种语言。I could drive a car before I left school.毕业前我就会开车。3构成否
4、定句时，not放在其后面。My little brother cant swim.我弟弟不会游泳。4情态动词后接动词原形。You will do as I told you.你得按我说的去做。He might come tomorrow，but I am not quite sure.他可能明天来，但我不确定。即时训练1 单句改错We should to study hard for our motherland and ourselves._She can sings that song in English._This book doesnt must be removed from th
5、e library._去掉tosingssingdoesnt mustmustnt二、基本用法1can与could的用法(1)表示能力：can用来表示现在的能力，could表示过去的能力。I can play basketball now，but I couldnt when I was young.现在我会打篮球了，但小时候我不会。(2)表示请求和许可：could语气比can委婉，但回答时只能用can。Can/Could you lend me a hand?你能帮我一下吗？(3)表示推测，意为“可能”。多用于否定句或疑问句。Can he be in the reading room now
6、?No，he cant be in it.Because I saw him in the office just now.他现在可能在阅览室吗？不，他不可能在(阅览室)。因为我刚刚在办公室看见他了。(4)表示理论上或习惯上的可能性，意为“可能会”。Jogging can be beneficial to the health.慢跑可能对身体健康有益。明辨异同 can，be able to 表示“能力”时的区别can用于指现在，常表示自身具有的能力 be able to 用于各种时态，表示经过努力后所具有的能力Babies can swim when they were born.婴儿们刚生下
7、来时会游泳。(自身具有的能力)Without his hard work，he was not able to get good grades.如果没有他的努力工作，他是不可能取得好成绩的。(经过努力)即时训练 2 单句改错Sarah didnt believe his explanation and cant forgive him._It mustnt be Peter，for he has gone to Beijing._You cant never be too careful to cross the road._cantcouldntmustntcantcantcan或去掉nev
8、er2may/might(1)表示允许、许可。might 在语气上比 may 更委婉。以 may/might开头的问句在否定回答中要用 mustnt。You may choose whatever you like.你喜欢什么就选择什么。May I stay in the room for a while?我可以在这个房间待一会儿吗？Yes，you may./No，you mustnt.是的，可以。/不，不可以。(2)表示把握不大的推测，意为“有可能”。用于肯定句或否定句中；might 语气更加不肯定。They may come to attend the meeting，or they ma
9、y not.他们可能来出席会议，也可能不来。(3)may 和 might 的其他用法。“may主语动词原形”表示祝愿。May you have a good time！祝你过得愉快！May you succeed！祝你成功！“may/might as well动词原形”表示“不妨，还不如”。I may/might as well start at once.我还不如马上就动身。即时训练 3 完成句子我能将这本书带出去吗？the book out?不，你不能。.言语不多的人未必就是害羞，他们或许就是安静的人。Some people who dont like to talk much are n
10、ot necessarily shy；they.May I takeNo，you mustntmay be quiet people3will/would(1)表示意愿，would 是 will 的过去式。We will do our best to save the child.我们会尽力抢救这个孩子。I would like to have a word with you.我想同你说句话。(2)表示征求意见或提出请求。would 的语气更加委婉。Would you close the window for me?请你帮我关上那扇窗好吗？(3)表示习惯或特性以及自然的规律性。will 用于现
11、在，would 用于过去。Oil will float on water.油总是浮在水面上。He would get up early when he lived in the countryside.他住在乡下时总是早起。(4)表示推测，意为“可能，大概”。That will be the book you want.那大概是你想要的书。明辨异同 would/used towould表示“过去常常”，但仅表示过去的习惯性动作(不表示状态)，现在有可能还如此，也可能不再那样 used to表示“过去常常”，既表示过去的动作也表示过去的状态，不过现在不再做或不再有那种状态了即时训练 4意义匹配(
12、A.意志、意愿；B.请求；C.自然规律)。Whatever he says，I will never trust him.()The girl asked whether her friend would go with her to do some shopping.()These trees will die without air and water.()Would you please close the window？Its a bit cold.()AACB4shall 与 should 的用法(1)shall 用于疑问句中多表示征求建议，主要用于第一、三人称。When shall
13、 he be able to leave the hospital?他什么时候能出院？(2)用于肯定句中多表示说话者的允诺、告诫、威胁、命令、规定、必然性等，主要用于第二、三人称。Persons under 18 shall not be employed in night work.不满十八岁的人不得被雇佣干夜间工作。(3)should 表示劝告或建议，意为“应该；要”。We should help others when they are in trouble.当别人有困难时，我们应该帮助他们。(4)should 表示义务或责任，意为“应该；理应”。We should learn from
14、 each other.我们应该互相学习。(5)should 表示推测，意为“应该；可能”。If the train is on time，she should arrive in Beijing by seven oclock.如果火车准点的话，她应该在 7 点钟到达北京。(6)should 表示惊讶或意外，意为“竟然”。Its strange that he should come so late.他竟然来这么晚真是奇怪。即时训练 5 完成句子你明天可以拿到那本书。You that book tomorrow.如果你不来，我就不告诉你这个消息了。If you cant come，I you
15、 the news.孩子们应该被告知真相。Children the truth.shall haveshall not tellshould be told5must 的用法(1)must 表示命令或强烈的建议，意为“必须”。All the students must obey the school rules.所有学生必须遵守校规。(2)表示十分肯定的推测，意为“一定；准是”。Betty must be in the next room.I can hear her talking there.贝蒂肯定在隔壁房间。我能听见她在那儿讲话。(3)表示说话人的一种态度，意为“偏要；硬要；偏偏”。W
16、hy must he go out in the bad weather?为什么他偏要在这种坏天气出门？Must you make so much noise when I have a rest?你就非得在我休息时弄出这么大的声音吗？(4)must not 表示禁止，意思是“不许”、“不准”、“不可以”等。You mustnt stop your car in the busy street.你不能把车停在繁忙的路上。(5)回答 must 问句时，肯定回答多用 must；否定回答多用 neednt或 dont have to。Must I finish my homework before
17、eight oclock?Yes，you must.(No，you neednt./you dont have to.)我必须要在 8 点之前完成作业吗？是的，必须。(不，没必要。)即时训练 6 写出下列句中 must 的含义You must practice your spoken English if you want to improve._Why must you always interrupt me？_She must be tired after such a long walk._必须偏要；硬要；偏偏一定；准是语 法 应 用 落 实.用适当的情态动词填空1Miss Fang r
18、ead for very long with her eyes hurt.2You be Carol.You havent changed a bit after all these years.3You be careful with the camera.It costs!4You feel all the training a waste of time，but Im a hundred percent sure later youll be grateful you did it.couldntmustmustmay5Although you find bargains in Lond
19、on，its not generally a cheap place to shop.6It was surprising to me that they，so poor themselves，bring me food.7I still remember my happy childhood when my mother take me to Disneyland at weekends.8When I was a child，I watch TV whenever I wanted to.9A machine work for itself；it must be operated by m
20、an.10You leave the little boy alone at home.He is too young.canshouldwouldcouldcantmustnt.完成句子1除此之外，你必须注意书写。Besides，you.2另外，我们应当学会如何和别人好好相处。In addition，we.3我希望这些变化不会给你造成麻烦。I hope the changes.will not cause you too much troublemust take notice of the handwritingshould learn how to get along well with others4我们对组织班级活动可能有不同的观点。We in organizing class activities.5如果你能和我一块去我会更高兴。I will be more than happy if you.can go together with memay have different opinionsThank you for watching!
