八年级下册全册英语导学案精选.doc

八年级下册英语学案 Unit3 Section A 【知识目标】本课的13个单词以及相应的动词短语、介词短语。 ① A:What were you doing when the UFO arrived ? B:I was standing in front of the library when the UFO arrived. ② A:What was the boy doing when the UFO landed? B:He was sleeping late. 【重点】过去进行时 was / were + doing sth. 【难点】过去进行时时态的熟练运用，when 和while 的用法区别 【学习过程】 Step1 自主学习 1.一个飞碟_____________2.理发店_________3.在盥洗室_________ 4.在卧室__________ 5. 在厨房里____________ 6.出去_______________ 7.一个外星人__________ 8.buy(过去式)__________9.get(过去式)______ 10.一次不寻常的经历______11. 起飞________12.kid(现在分词)_________ Step2 知识梳理 （一）过去进行时 1.含义：表示过去的某一时刻或某一时间内正在进行或发生的动作。 2.构成：was/were +v-ing。 3.标志：at that time, this time yesterday, all the evening, from 8:00 to 10:00yesterday, just then, at nine yesterday, when等表示明确有具体的时间状语。eg： I was doing my homework at this time yesterday. What was Tom doing at ten yesterday. I was eating dinner when the phone rang. 4.具体的句型： (1)肯定句：主语+was/were +v-ing eg： They were having a meeting that time. (2)否定句：主语+was not(wasn’t)/were not(weren’t) +v-ing 上句改写为：They were having a meeting that time._____________________ (3)一般疑问句式：Was/Were +主语+v-ing？ 肯定回答：Yes，…was/were. 否定回答：No，…wasn’t/weren’t. Eg：Was she reading a book when the teacher came in? Yes, she was. / No, she wasn’t. (二)when与while用法 1.when是“当……时候”，相当于at that time,既可以表示某一时刻又可以表示某一段时间，所以when引导的时间状语从句动词既可以是延续性的，又可以是非延续性的。when引导的时间状语如果是一般过去时，主句一般用过去进行时。而while也意为“当……时候””，相当于during the time，表示某一段时间历里的情况，故其引导的时间状语从句中的动词必须是延续性的。eg： While I was watching TV, my mother came back. =When my mother came back, I was watching TV. 2.while重在强调其后的动作与助于动作的对比，表示“与此同时”。eg： She was listening to music while I was playing computer games. （三）练习 1）_____ the teacher came in, we were talking and laughing. 2)I got home______ my mother was cooking dinner. 3)They were dancing _____ we came to meet them. 4)_______the alien was visiting the museum, the boy called the police. Step3 学习 3a部分 1.读课文，写出下列短语和句型。 1)一次不寻常的经历 __________ 2)大约在十