一、教学内容：动词的时态中比较类似的几种时态的比较：现在完成时和现在完成进行时，现在完成时和过去完成时，一般过去时和过去完成时。二、教案Teaching Goals:1. To enable Ss to know about the way to use similar tenses.2. To enable Ss to master the usage of“did”, “have done”, “had done” and “have been doing”.3. To help Ss learn how to use correct tense to express conjecture.Difficult points & key points:Make a different of did and have done, have done and have been doing, did and had doneTeaching Procedures:Step 1. RevisionCheck the answers to the Vocabularyexercises in the Workbook.Step 2. Function1. Ask Ss to do Activity 1 on page 54 and call back the answers. Then give them the correct answers.2. AskSs to identify the creatures in the pictures in Activity 4 on page 55, by using“did”, “have done”, “had done” and “have been doing”.3. AskSs to do Activity 2 on page 54 individually. Then check their answers.Step 3. Grammar1. Leading-inAsk Ss to work in groups and discuss the question in Activity 1 of Grammar on page 57. Then give them the right answer.2. Explanation一般过去时： 关于该时态最主要请大家掌握它的概念：一个开始于过去结束于过去的动作，或存在的状态。记住这一点很重要，需要与现在完成时区分。如：The other day she ran across an old friend in the street.现在完成时：这应该是五个基本时态中最令大家迷惑的一个。该时态分为已完成和未完成两种。常见的标志性的词有：since, for, already, so far, up to now, in the last few years, in the past three months etc.如：1> He has lived here since he got married.2> In the past two decades, research has expanded our knowledge about sleep and dreams.3> In the last ten years great changes have taken place in China.现在完成进行时：表示现在以前一直发生的动作，强调动作在进行过程中的不间断，常有背景句作为铺垫。如：—You are all wet!—Yes, I have been playing basketball all the morning.过去完成时：别名“过去的过去。”考题中对该时态的使用有要求，只有当句中有一个动作是过去时，才有可能用过去完成。如：1> The film had almost finished when I got to the cinema.2> By the time he was ten, he had built himself a chemistry lab.3. PracticeAsk Ss to do Activity 2 on page 57. Then call back the answers and correct them.4. ConsolidationAsk Ss to translate the following sentences.Step 4. Homework1. Ask Ss to review Grammar.2. Ask Ss to finish Grammar exercise