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Topic 1 Pollution has caused too many problems.Section AThe key points and difficult points1. Key points: Words and phrases: bee, butterfly, mess, shame, several, pollute, waste, villager, destroy, cut down, goodness, pour, see sb./sth. do sth., see sb./sth. doing sth., cut down, my goodnessSentences: What a shame! / What a mess! The flowers and grass have gone! What has happened here?There be sth./sb. doing sth. There are several factories pouring waste water into the stream.Everything has changed. Grammar: differences between Simple Past and Present Perfect tense. 2. Difficult points： 正确使用there be sth./sb. doing sth.来表达“有某人/物正在做某事” 。 区别使用短语see sb./ sth. do sth.和 see sb. / sth. doing sth.。 能正确地以口头和书面形式区别使用一般过去时和现在完成时。 Teaching procedures:Stage 1 Getting students ready for learningGreet and talk about the weather. Lead the Ss to discuss the right place for a picnic.Stage 2 Lead-inLet the Ss discuss where to have a picnic. Encourage them to state the reasons.Stage 3 Pre-listeningPresent two pictures of the West Hill and describe the changes. Teach the new words and some difficult sentences.Stage 4 While-listeningStep 1: Let the Ss listen to 1a twice and do 1b alone.Step 2: Let the Ss listen to 1a again and pay attention to the pronunciation and the intonation. Then practice 1a in groups and role play it.Stage 5 Post-listeningStep 1: Let the Ss read 1a aloud and fill the blanks in 1c in groups.Step2: Let the Ss observe the pictures and study the example in 2 and try to make new dialogs according to the pictures and the given words. Then act out the dialogs.Step 3: Lead the Ss to look at the pictures and listen to the sentences once to number them. Then listen to them twice to complete the sentences.Stage 6 Summarizing and Assigning homeworkStep 1 :Sum up the main content of this class and the key pointsStep 2: HMK : Write a passage about pollution in some place you know. 2. Talk about how many kinds of pollution you know and make a list.
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