2022年高二英语Unit9 Saving the earth The Fourth Period 人教版Teaching Aims:1. Learn and master the following words: defend, incorrect, affect, advise2. Train the students listening and speaking abilities.3. Learn to write an evaluation paragraph.Teaching Important Points:1. Master the useful words and phrases appearing in this period.2. Learn to support an opinion both in speaking and writing.Teaching Difficult Point: How to help the students finish each task and improve their skills to use language.Teaching Methods :1. Oral practice to train the students speaking ability.2. Written work to train the students writing ability.3. Individual, pair or group work to make every student work in class.Teaching Aids:1. a tape recorder2. a projector4. the blackboardTeaching Procedures:Step I GreetingsGreet the whole class as usual.Step II Revision and Lead-inT: Yesterday, we learnt the use of Inversion and did some exercises. Can you tell me the difference between inverted sentences and usual sentences? Wu Li, would you like to have a try?Sl: Yes. In an inverted sentence, part of the predicate or the whole predicate es before the subject. In a usual sentence, the predicate es after the subject.T: Quite right. Sit down, please. Then for what reasons do you think Inversion is used? Any volunteer?S2: I think Inversion is used for two reasons. One for the need of the grammatical structure of a certain type of sentence the other for emphasis of a certain part of a sentence.T: Quite right. Now, lets do an exercise, Look at the screen and write your answers on a piece of paper. Then I11 check the answers with the whole class. (Teacher shows the following on the screen. )Rewrite the following sentences using Inversion.1. We can finish the work on time only by seizing every minute. _ _ _ _ _ _ _finish the work on time.2. I have never heard such nonsense in all my life._ _ _ heard such nonsense in all my life.3. A piece of paper was folded in the pocket. _ _ _ _ _ a piece of paper.4. He little realizes how important this heart operation is. _ _ _ _ how important this heart operation is.5. Churchill was not only a statesman but also a poet. _ _ _ Churchill a statesman but also a poet.Suggested answers: 1. Only by seizing every minute can we2. Never have I3. Folded in the pocket was4. Little does he realize5. Not only wasT: Well done. Besides, weve read a passage in this unit about the Earth Summit and environmental problems and solutions. What words weve learnt in this unit can help us describe environment problems and solutions?Ss: Sustainable development, contaminated drinking water, poor sanitation, air pollution, killer, poverty, war, violence, equality, fairness, take action, make changes, education, in harmony with nature.T: Oh. So many. I hope you can remember and use them. We know the Earth Summit mainly talks about environment problems and solutions. Experts from all over the world are wele to the Earth Summit, speaking about different topics and discussing new ways to solve old problems. Today we are going to listen to the voices of the Earth Summit. And well talk about the environment problem again. First, lets learn the new words in this period. (Teacher shows the new words on the screen and gives brief explanations.) ( Bb: alternativealternate; defend against/from; incorrect-correct; affect/effect; advise sb. (not) to do sth. ,advise doing sth. )Step III Listening and SpeakingT: Well, now please open your books at Page 71. Look at the first part in Listening and Speaking: Listen to the speeches from the Earth Summit and plete the outlines below, Ill play the tape twice continuously. Listen carefully and finish your task. At the end ,Ill check your answers.(After listening, teacher introduces the next task.)T: Well done. Youve understood the speeches exactly. Do you agree with what they are saying? Work in pairs to talk about this question. Write down your thoughts, ments, opinions and questions about what they said. Prepare for a few minutes. Then well go on with the next task. (A few minutes later.)T: OK. Now you have a chance to make your own speech. Use your notes and think about what you would like to say. First, write an outline, and then give the speech in class. Make sure that you are ready to answer questions and defend your argument. Are you clear?Ss: Yes.T: You can begin to prepare tot it now. (Another few minutes later.)T: Are you ready?Ss: Yes.T: OK. Now lets begin our speech. Each student should listen to your classmates speeches carefully and get ready to ask them questions. Whod like to be the first to give your speech? Any volunteer7S: (One of the students stands up and giv