八年级英语上册 Unit 8 Natural disasters Grammar教案 （新版）牛津版.doc

unit 8 natural disastersgrammari. teaching aims and learning objectivesby the end of the lesson, students should be able to:1. use the past continuous tense to talk about things that were happening at a particular time in the past;2. use conjunctions of time “when, while, as” to talk about things.ii. teaching contents1. new words and phrases: break down, because of2. new structures: i was sleeping when the earthquake started.outside, people were running in all directions while pieces of glass and bricks were falling down.hours later, as i was trying to find my way out, i suddenly heard some noise above me.iii. focus of the lesson and predicted area of difficultyintroduce the structure of the past continuous tense.tell the differences among “when, while, as”.iv. teaching proceduresa past continuous tensestep 1 lead-in1. show some pictures of the taiwan earthquake, and ask three questions: what was timmy doing when the earthquake started?what were people doing while pieces of glass and bricks were falling down?what did timmy suddenly hear as he was trying to find his way out?2. watch a video and then answer a question what were people doing when the earthquake happened?【设计意图】有目的、有意义地导入，既复习了阅读部分学习的内容，同时也引导学生思考过去进行时态。step 2 presentation1. ask the students to read the sentences on the screen to discover the rulet: today we will be learning about the past continuous tense. please work in pairs. read these sentences and try to find out the rule. 2. circle the verbs in the past continuous tense3. work out the rule (1) explain the structure of the past continuous tense. (2) explain the usage of the past continuous tense. 【设计意图】采用归纳教学法，让学生自己发现语法规则更符合现有的心智结构，更便于记忆与运用。step 3 practice1. make sentencesask the students to watch the pictures and make sentences.the boys were playing football at 4 p.m. yesterday.the woman was shopping at this time yesterday.the girl was reading the whole night yesterday.2. change sentencesget the students to put the three sentences into negative, general questions and make responses.3. complete part a on page 97【设计意图】针对前面讲解进行针对性练习。step 4 extension1. get the students to complete some questions on the entrance examinations.2. compare the past continuous tense with the present continuous tense and the simple past tense.【设计意图】通过选取中考题中与过去进行时相关的部分，并帮助学生弄清楚过去进行时与现在进行时和一般过去时的区别。b using when, while and asstep 1 presentation1. explain the usage of “when”, “while, “as” t: they all mean “during the time that” and can be used to introduce a long action that started before a short action.2. explain the differences among “when”, “while, “as” if the longer action is in the main clause, we often use “when” to join them. when there are two long actions, we often use “while”. “as” can also be used to join two short actions that happen at the same time.【设计意图】使学生理解三个连词的共同点和各自的不同点。step 2 practice1. fill in the blanksget the students to fill in the blanks with “when”, “while” or “as”.2. complete part b on page 98【设计意图】帮助学生学会正确使用when，while和as。step 3 activity1. do a surveyget the students to complete the survey with their own information.2. look and answer get the students to watch the pictures and answer the questions.3. look and sayget the students to