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Unit 8 Have you read Treasure Island yet ? Lesson 3 Section A (Grammar Focus –4c ) Teaching aims: Knowledge aims : Ss can use present perfect tense to talk about events. Ability aims: Talk and write using present perfect tense. Moral aims: Teasure time and everything. Teaching key points: have / has done 过去分词 already / yet Teaching steps: Step1, Grammar Let Ss read the sentences in Grammar Focus, find out how to use present perfect tense. Give Ss some time to find sentences with present perfect tense in section A, then read to the class. Let Ss read page 110 in textbook.整理现在完成时的构成，句型转换。 Step 2, Past participle Show a chart to Ss ,let them read and find out the regularity. regular play-played-played help-helped-helped irregular AAA read- read- read cut-cut-cut ABB meet-met-met tell-told-told ABC sing-sang-sung take-took-taken ABA come-came-come run-ran-run | 
