Unit 4 Exploring literature Grammar and usage 课件-2025-2026学年高中英语译林版（2019）必修第二册

Modal Verbs Learning Objectives 1 Understand the meanings of modal verbs. 2 Discover grammar rules from reading. 3 Use modal verbs to give advice about books. Guess the Book You will see three clues about a book. Try to guess the title of the book. Raise your hand if you know the answer. Clue 1: A boy studies at a magic school. Clue 2: He fights against a dark wizard. Clue 3: His best friends are Hermione and Ron. The boy who lived Which book is it? Harry Potter Can you finish this book in one week? Clue 1 A monkey king is very powerful. Clue 2 He protects a monk on a long journey. Clue 3 They travel to the West to get Buddhist scriptures. Which book is it? Journey to the West Should teenagers read this book? Clue 1: A little boy travels across different planets. Clue 2: He meets a fox and learns about love and friendship. Clue 3: The story is short but meaningful. Which book is it? The Little Prince You may find this book interesting. You must read it. Lead to Grammar In the discussion, we used these words: can should may must These are modal verbs. Modal verbs help us express: • ability • necessity • suggestion • possibility Reading Task Read the passage: What shall I read? Task: 1 Find sentences that contain modal verbs. 2 Underline them in the passage. Exploring the Rules Complete the table with examples from the passage. Function Example Ability Necessity Possibility Teachers...can provide suggestions... ...what books you ought to read. You might have asked yourself... These ideas should point you... ...you may find yourself better able to... Suggestion What shall I read? ...you can get ideas from different sources... You could also read book reviews... A book review can often tell you whether... ...you must also decide for yourself what... You do not have to read a book just because... Reading Practice Fill in the blanks according to the passage. If you are not sure what to read, you ______ get ideas from different sources. Teachers ______ provide suggestions. A book review ______ tell you whether a book is worth reading. can can can Working out the Rules Does the same modal verb have only one function? The same modal verb may express: • ability • necessity • suggestion • possibility Modal verbs can be followed by ___. a) do b) doing c) did d) be done e) be doing f) have done Correct Answers a) do d) be done e) be doing f) have done You can read this book. The book must be finished today. She may be reading in the library. You must have heard this story before. Identify the Meaning 1 You can finish this short story in one hour. ability 2 Students must return books on time. necessity 3 You should read more English novels. suggestion 4 You may find this book interesting. possibility Find the Mistakes Correct the mistakes. 1 He can to read this novel very quickly. 2 Students must returning library books on time. 3 The book should finish in a week. return be finished in a week. Sentence Rewriting Rewrite the sentences using modal verbs. Draft 1 It is possible that you will like this book. 2 It is necessary for students to return books on time. 3 It is a good idea for teenagers to read more novels. 4 She has the ability to finish the novel today. You ______ like this book. Students ______ return books. Teenagers ______ read more novels. She ______ finish the novel today. may must should can Applying the Rules Choose the sentence where the modal verb has a different meaning. Group 1 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 this long novel in a month? Group 2 a I may be unable to finish this novel today. b It may be difficult for people to agree on what good literature is. c You may go to the library tomorrow afternoon. Permission Ability Ability Permission Possibility Possibility Applying the Rules Choose the sentence where the modal verb has a different meaning. Group 3 a I must finish writing the book review before Wednesday. b You must be tired after three hours’ reading. c Students must develop the habit of reading classic literature. Group 4 a Henry should be reading books in the library. b I have fifty dollars—that should be enough for three books. c Reading English novels has greatly increased my vocabulary—you should try it too. Possibility Possibility Necessity Suggestion Necessity Possibility Complete the paragraph with modal verbs. can't must could must can should ought to Make rules for your school library with modal verbs. You must not bring food or drinks. You cannot take the books out of the reading room. Students must keep quiet in the library. You must not eat or drink inside the library. Students should return books on time. You can borrow up to three books at a time. Summary Modal verbs express: ability necessity suggestion possibility Grammar structure: Modal verb + base verb Example You can read this book. Students must return books on time. Homework Write a short paragraph. Topic What books should teenagers read? Requirements • Use at least four modal verbs: can, may, must, should • Word limit: 80–100 words $