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发明创造不是一蹴而就，需要有百折不挠、永不言败的精神。教材分析
1重点some new words and useful phrases; passive voice
2难点past &present passive voice
3教法 listening, speaking and discussing
4教具 multimediaThe main activities1a and 2aTeaching procedureStep 1 Review 1. Guess the riddles.
2. Learn the names.Step 2 Presentation
1. Read the questions in 1b.
2. Listen to 1a and do 1b. Check the answers. Finish 1b.
3. Read 1a and do 1c.
4.Do the guessing game and finish 1d.Step 3 Consolidation
1. Read 1a again and find out the difficult and key points.
2.. Do 2, check the answers and finish 2.
3..Know about the perfect passive.Step 4 Practice1.Listen to 3, check the answers and finish 3.
2.Read the words, and then listen to the tape and check the vowelsStep 5 Project
1. Listen and read the sentences in 4b and find out the rules of stress and intonation
2. Use the words in 4a to make up similar conversations.
3. Sum up the key points of this section.Homework1. Read 1a.
2. Memorize the useful expressions and key sentences that we learn today.板书设计：
Unit 4Topic1ction B
Words and phrases: bulb plane=airplane
Sentences:
It’s said that he invented more than two thousand things during his life.
Nowadays, their materials have been changed so that it feels more comfortable.
They are designed not only for workers but also for teenagers and women.
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