Lesson 43

　　Lesson 43

　　Properties: Recorder; Overhead Projector; Pictures.

　　Teaching aims:

　　　　1. Measurement.

　　　　2. The Passive Voice

　　　　3. With modal auxiliaries (can, may, must. . . .)

　　Language Focus:

　　　　Learn how to use measurement and the Passive Voice with modal auxiliaries

　　Teaching Procedures:

　　I. Showing the teaching aims

　　II. Revision

　　　　Check the students' retelling.

　　III. Leading in

　　　　Let the students look at the following sentences. Pay more attention to the underlined words.

　　　　1. Peter is one metre seventy tall.

　　　　2. The room is ten metres long.

　　　　3. The window is 3 metres wide.

　　　　4. The hill is 50 metres high.

　　　　5. The well is 4 metres deep.

　　　　Ask the students to tell the structure. Point out the position of the adjective at the end of the sentence again.

　　IV. Practice

　　　　Do Exercise 1 in the students' books. Read through the phrases in the boxes, and make up true sentences by themselves. Then check the answers with the whole class.

　　　　Let the students do some translation exercises.

　　V. Presentation

　　　　Revise the instruction for planting trees, using "should" and "must".

　　　　(not + be + past participle). Then tell the students that we can use the Passive Voice in the same way. Give them some examples.

　　　　1. The homework must be done.

　　　　2. The fish must be cooked.

　　　　3. The books should be returned tomorrow.

　　　　4. The tree must be tied to the stick.

　　　　5. The hole should be dug first.

　　　　Let them repeat the sentences. Point out the use of must/ should + Passive Voice. Then help the students change the sentences into the Active Voice and make sure they can understand the difference between the Active and Passive Voice.

　　　　For instance:

　　　　We should plant many more trees. (Active)

　　　　Many more trees should be planted. (Passive)

　　　　The Passive Voice is used when it is not necessary to mention the doer of the action.

　　VI. Practice

　　　　Get the students to make up sentences using the words in the boxes. Do Exercise 2 and Exercise 3. First do the first one as an example, and then let the students work in pails, and make up sentences. Collect some examples from the whole class.

　　VII. Workbook

　　　　Do Exercise 1 orally first, then write down the answers.

　　　　For Exercise 2, do it together. The answers are: 1. think 2. long, wide, wide 3.deep, deep 4.high/ tall, high/ tall 5.tall

　　　　For Exercise 3, Fill in the blanks, check the answers. The answers are:

　　　　Be, made, long, wide, through, stopped, warm, more, all, in

　　Exercise in class

　　　　Put these sentences into the Passive Voice.

　　　　1. You must finish your work today.

　　　　2. They can repair the road in two hours.

　　　　3. We shouldn't laugh at that poor child.

　　　　4. Can they plant trees in that place?

　　　　5. They may grow some flowers in the garden.

　　　　Answers: 1. Your work must be finished today.

　　　　2. The road can't be repaired in two hours.

　　　　3. The poor child shouldn't be laughed at.

　　　　4. Can trees be planted in that place?

　　　　5. Some flowers may be grown in the garden.

　　VIII. Homework

　　　　1. Revise the contents of this unit, particularly the use of the Passive Voice.

　　　　2. Make ten sentences in both the Active Voice and the Passive Voice.