英语人教版八年级下册Unit 5(Gramma Focus ~4c).docx

Unit 5 What were you doing when the rainstorm came?(Grammar Focus -4c )教学目标灵活运用过去进行时，并掌握while和when的用法。能够学会讲述过去的事情培养学生学习英语的积极性和兴趣。重点和难点学会使用when和while，灵活掌握过去进行教学思路本课的教学内容是人教版八年级下第5单元第三课时。通过复习现在进行时引出过去进行时，两者相对比，是学生清晰分辨，并从中体会when 和while的用法。接着通过练习，进一步熟练运用它们。教学准备多媒体教学课件，黑板教学过程Step 1 Greeting and Revision Look at the pictures and revise the present progressive tenseStep 2 Grammar Focus 读下列句子，能否总结出句子中包含的语法？ 1. What were you doing at eight last night? I was taking a shower. 2. What was she doing at the time of the rainstorm? She was doing her homework. 3. What was he doing when the rainstorm came? He was reading in the library when the rainstorm came. 4. What was Ben doing when it began to rain heavily? When it began to rain, Ben was helping his mom make dinner. 5. What was Jenny doing while Linda was sleeping? While Linda was sleeping, Jenny was helping Mary with her homework.Step 3the past progressive tense1. 基本概念：过去进行时表示在过去某一时刻或一段时间内正在进行的动作。这一特定的过去时间除有上下文暗示以外, 一般用时间状语来表示。2. 结构was / were ( not ) + 动词-ing3. 句式 肯定式：I/He/She/It was working.We/You/They/ were working.否定式:I/He/She/It was not working.We/You/They/ were not working. 疑问式和简略回答:Was I working?Yes, you were.No, you were not.Were you working?Yes, I was.No, I was not.Was he/she/it working?Yes, he/she/it was.No, he/she/it was not.Were we/you/they working?Yes, you/we/they were.No, you/we/they were not.注：1) was not常缩略为wasnt; were not常缩略为werent。2) 一般过去时与过去进行时用法的比较: 一般过去时表示在过去某个时间发生过的动作或存在的状态, 而过去进行时则表示在过去某一时刻或某一段时间正在进行的动作。例如:David wrote a letter to his friend last night.大卫昨晚给他的朋友写了封信。(信写完了。)David was writing a letter to his friend last night.大卫昨晚一直在给他的朋友写信。(信不一定写完。)Practice: Look at the picture and make up the dialogues.Step 4when and while when和while都可表示“当的时候”，引导时间状语从句。你知道两者在过去进行时中的用法有什么不同吗？完成课件中的练习。Step 5Practice 4a. Look at the table and write sentences with both while and when. John Marytake photos buy a drinkplay the piano leave the houseclean his room turn on the radioshop take the car to the car wash 4b. Fill in the blanks with was, were, when or while. At 7:00 a.m., I woke up. _ I _ making my breakfast, my brother _ listening to the radio. _ I was eating, the radio news talked about a car accident near our home. My brother and I went out right away to have a look. _ we got to the place of the accident, the car _ in bad shape from hitting a tree. But luckily the driver _ fine. The roads _ icy because of the heavy snow from the night before.Step 6Speaking 4c. What were you doing at these times last Sunday? Fill in the chart. Then ask your partner. Yo