必修二 Unit 4 Grammar and Usage 教学设计
Teaching aims:
By the end of this section, students will be able to:
identify and categorize the usage of modal verbs;
summarize general rules of modal verbs;
distinguish and use the right modal verbs to finish tasks of offering suggestions and making rules.
Teaching key and difficult points:
Distinguish and use the right modal verbs to finish tasks of offering suggestions and making rules.
Teaching procedures:
Step 1: Lead in (Free talk)
What kind of book do you like to read Why do you like it
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Step 2: Learning
Task 1: Read the website article and complete the mind map.
Task 2: Find the sentences that use modal verbs and fill in the table.
Suggestion What shall I read …you can get ideas from different sources… ...what books you ought to read You can also read book reviews in newspapers in magazines or online.
Ability Teachers in particular can provide suggestions for interesting reading materials that can be found in the library or bookshop easily. A book review can also tell you whether a book is worth reading or not.
Necessity However, you must also decide for yourself what kind of books to read. You do not have to read a book just because everyone recommends it.
Possibility You might have asked yourself this question more than once. These ideas should point you in the right direction. …you may find yourself better able to seek out books to your taste…
Working out the rulers
Model verbs can express ability or necessity. They can also make suggestions or describe the probability of an event. The same modal verb can have different functions.
Modal verbs can be followed by _____________. (a,d,e,f)
You can choose more than one answer for the blank.
do(the base form) d. be done(the passive voice)
b. doing(the verb-ing form) e. be doing(the continuous form)
c. did (the past form) f. have done (the perfect form)
Task 3: 情态动词
定义:情态动词是一种本身有一定的词义, 表示说话人的情绪,态度或语气的动词,但不能单独作谓语,只能和其他动词原形构成谓语。
常见的情态动词主要有:can/could,may/might,must/have to,will/would,shall/should/ ought to,dare等。
can/could
表示能力,意为“会,能”
Eg. I can speak English fluently.
表示可能性,意为“可能会”
Eg. Water can be turned into ice if it is cold enough.
表示许可或请求, 意为“可以”
Eg. Can you speak English Fluently
You can’t eat in the classroom.
表示推测,常用于否定句和疑问句中 can’t=can not 意为“不可能”
Eg. The door is open. Who can be in the classroom
This book can’t be mine. My book is in my bag.
may/might
表示请求,许可,意为“可以”,比can/could更为正式
Eg. May I open the window
You may/can call me tomorrow.
表示推测,用于谈论可能性,常用于肯定句,意为“可能,或许”
Eg. I can’t find my book, I may have left it in my home.
表示祝愿
Eg. May you get more than you wish.
must/have to
表示“必须”
Eg. I must keep my word.
It rained heavily, so the students had to stay at home.
注意:must多为主观意志,have to多为客观需要;must只有一种时态,have to 则有多种时态变化。
shall/should/ought to
Shall的用法
用于第一、三人称为主语的疑问句中,表示说话人征求对方的意见或请求
Eg. Shall I change into the evening dress for your party
Shall Mary go to the party with me
用语第二、三人称做主语的陈述句中,表示说话人给对方的许诺、命令、警告等
Eg. You shall get an answer from me tomorrow.
Should的用法
作为shall的过去式,用于第一、三人称为主语的疑问句转化而成的间接引语中,以征求对方的意见
Eg. I asked the teacher if I should have one day off.
表示义务、职责等,意为“应该”
Eg. I think you should make an apology to her.
Ought to的用法与should差不对,should多表达自己的主观看法,ought to 则多反映客观情况。
will/would
表示意愿
Eg. They would not let me in because he was poorly dressed.
I will help you.
表示请求
Eg. Will you come in this way, please
表示规律性的“注定会”
Eg. You will regret forever if you lose this golden chance.
表示习惯或特性
Eg. Mary will keep asking some silly questions.
Step 3: Application
B1 For the following groups of three sentences, tick the sentence which uses the modal verb differently from the other two.
R a Can I keep the book for more than two weeks
b Nick can read more in an afternoon than I can in a week!
c Can Mary finish War and Peace in a month
a I am afraid I may be unable to finish this novel today.
b It may be difficult for people to agree on what good literature is.
R c You may go to the library tomorrow afternoon, if you have time.
a I must finish writing the book review and hand it in before Wednesday.
R b You must be tired after three hours’ reading.
c Students must develop the habit of reading classic literature.
a Henry should be reading books in the library.
b I have fifty dollars—that should be enough for three books.
R c Reading English novels has greatly increased my vocabulary — you should try it too.
B2 Below is an entry in a student’s reading plete the entry with the correct model verbs in brackets.
When my English teacher suggested that I read Charles Dickens’s A Christmas Carol, I thought, “I (1)_______(can’t/shouldn’t) read this! It (2)_______(has to/must) be very boring.” Surprisingly, it turned out the exact opposite. I (3)___________
(could/might) not stop turning the pages!
The book’s main character is Scrooge, a rich but mean old man. He hates all kinds of celebrations. On Christmas eve, he is transported to different points in his life by three spirits. In the end, he reflects on these moments and realizes his mistakes. Then he decides that he (4)_____________(might/must) change himself. On Christmas morning, he sends a large turkey to a poor man for Christmas dinner. He also tries to make his family and friends happy by spending time with them.
There is something that (5)___________(can/must) be learnt from A Christmas Carol: we (6)_________(should/may) treat others with kindness, generosity and love. I think everyone (7)_____________ (would/ought to) read this book.
参考答案: can’t must could must can should ought to
Step 4: Summary
Review what have been learnt.