江苏省句容市行香中学八年级英语上册 Unit 8 Natural disasters Grammar教案 （新版）牛津版.doc

natural disasters一、教学目标1.学会正确使用过去进行时2.学会使用when.while和as教学重点、难点正确使用过去进行时以及when.while和as二、词汇、短语 1break. v /broken adj/break-broke-broken2 terrible可怕的、糟糕的 adj/terribly adv3hit 击中 过去式hit4fall over跌倒5make a snowball/snowman堆雪球/雪人三、句型（语法）i was sleeping at 10p.m last night.i was sleeping when the earthquake started. people were running in all directions while pieces of glass and bricks were falling down. when/while/as millie was watching tv, andy came into the roommillie was watching tv when andy came into the room. 【课前导学】1.写出下列单词的现在分词：play_step_hide_discuss_plan_wait_buy_try_run_shop_begin_sit_search_mop_2.复习现在进行时，预习过去进行时的基本构成方法。【课堂学习】step1 duty report step2 look at some pictures to present past continuous tense. ask students to work out the rules1、表示过去某一段时间内一直进行的动作。时间状语: from 8:00to 9:00 last night等，也可由上下文暗示。2、 表示在过去某个时间点发生的事情。时间点如：then, at 8 oclock last night, when i was sleeping等。 what was she doing at nine oclock yesterday? (介词短语表示时间点) when i saw him ,he was decorating his room. (when从句表示时间点) 3、 通常不能用于过去进行时的动词（见课本p123）改错：1.i was knowing the answer._ 2.i wasnt understanding him. _4句型：group work 小组讨论，通过例子，总结规则肯定句：主语+was/were+doing+其它否定句：主语+was/were+not+doing+其它一般疑问句：was/were+主语+doing+其它? 肯定回答：yes,主语+was/were.否定回答：no,主语+wasnt/werent.特殊疑问句：特殊疑问词+was/were+主语+doing+其它? (1) i was reading at this time yesterday.否定句：一般疑问句：肯定回答： 否定回答：特殊疑问句：(2) they were watching tv when their mother got home.否定句：一般疑问句：肯定回答： 否定回答：特殊疑问句：step3 grammar2 when, while, as 都有“当.的时候”。1. while指一段时间，它所引导的从句中的谓语动词必须是延续的，不可以是瞬间性的动词，如：while he reached there，they were playing basketball. ( )while i was waiting for a bus, i met my cousin. ( )当强调两个延续性的动作同时发生时，常用“过去进行时+while+过去进行时”e.g. 当他在打电话的时候，我在写信。 i _ _ a letter _ he _ _ a phone call.(while he _ _ a phone call, i _ _ a letter.)当强调某个动作发生时，另一个动作正在进行，用“一般过去时+while+过去进行时” e.g. 我们正在读书的时候，老师走了进来。the teacher _ in _ we _ _. 我妈妈在睡觉的时候，电话铃响了。while my mother _ _, the telephone _.while的使用特点也可以记忆为：while 后面不接一般过去时(即短暂性动词)。2. when和as使用范围比while 广泛，它们引导的从句中的谓语动词既可以是延续性的，也可以是短暂性的。换言之，能使用while的句子也可以使用when或as替代，如“一般过去时+while/when/as+过去进行时”、“过去进行时+while/when/as+过去进行时” 都可以。when和as的特殊之处：when引导的从句中的谓语动词可以在主句的动词之前、之后发生。 when he finished his homework, he played the computer games for a while. (when相当于after，finish先发生) when i got to the park, the gate was closed. (when 相当于before， get to 后发生) when 引导的从句含有突然发生的意思： 我在街上散步，他突然喊我。i _ _ in the street when he called me.as可理解为“随着.”随着日子变短，温度开始下降。_ the days are shorter, the _ starts to drop.随着时间推移，中国日渐富强。_ time goes by, china is getting richer and stronger.step4 exercises【课后拓展】一、按要求进行句型转换1. we were having a pe class at four yesterday afternoon.(改为否定句)we _ _ a pe class at four yesterday afternoon.2. i was reviewing my lessons at eight last night.(改为一般疑问句，做肯、否回答，对划线部分提问)_3. he ran in the park .(用at this time yesterday改写)_4. they were playing computer games at nine last night.( 对划线部分提问)_5. i was reading a novel at three yesterday afternoon in the library.( 对划线部分提问)_. i was doing my homework 6.when it began to snow.（提问） _ _ you _ when it began to snow?7.he hid under the bed because he was afraid of the lightning. （提问） _ _ he _ under the bed?二、首字母填空1. to save the children in the fire, several firemen lost their l_.2. there was a big fire in that shopping mall. many people hurt their arms and legs. -it sounds t_.3. it was snowing h_. the snow covered here and there quickly.4. a big snowstorm h_ our city last night. luckily, no one was hurt.三、用所给动词的正确形式填空1. i _(play) the computer game at this time yesterday.2. she _(watch) tv on the sofa at eight oclock last night.3. eddie _(have) supper at seven oclock yesterday.4. we _(make) a snowman from 3.00 to 4.00 yesterday afternoon.5. i _(see) you in the street yesterday, tom. what _ you _(do)? -oh, i _(call) my friend.1. i _(play) the computer game at this time yesterday.2. she _(watch) tv on the sofa at eight oclock last night.3. eddie _(have) supper at seven oclock yesterday.4. we _(make) a snowman from 3.00 to 4.00 yesterday afternoon.5. i _(see) you in the street yesterday, tom. what _ you _(do)? -oh, i _(call) my friend.6. while he _(knock) at the door, my aunt _ (cook).7.the students _ (sing) and _ (dance) happily on the playground at that time.8._ they_ (feed) the animals at 5:00 yesterday afternoon?9. mrs. green _ (not wash) clothes at this time yesterday.10. grandpa _ (mend) his clock when i _(reach) home.11. as i _ (walk) in the park, i _(see) some children playing games.12. jane _(wait) for me when i _(arrive).13. _ he _(lie) on the ground at nine yesterday evening ?14. what _ jim _(write) when the teacher _(come) in ?15. my brother _(fall) off and _(hurt) himself while he _(ride) his bicycle.四、根据汉语提示完成句子：1、他们那时不在打排球。they _ _ volleyball at that time.2 当你回来时，他在看电视吗？_ he _ tv when you came back?3 昨天中午他在哪里等你？_ _ he _ for you at noon yesterday ?4 当我离开时，他正在做家庭作业。he _ _ his homework _ i left.5. 正当他们扫地的时候，老师进来了。 while they_ _ the floor , the teacher came in.6.地震开始的时候，很多人正在床上睡觉。many people _ _ in the bed when the _ _.7.你昨天这个时候在干什么？我在搜索因特网。_ _ _ _at this time yesterday? i_ _the internet.8.老师进来时，学生在小声说话吗？是的。_ the students_ softly when the teacher_ _the classroom? yes,_ _.9.当我看电视的时候，我弟弟在玩电脑游戏。_ i _ _ tv, my brother_ _ computer games.10.当他们在一家咖啡店闲聊时，突然听到一声像打雷似的巨响。_ they _ _with each other in a coffee shop, they suddenly _ a loud noise_ _.五、根据首字母提示写出单词，完成短文there was a big earthquake under the india ocean area o 1 december 26th 2004 and itc 2 a large tsunami（海啸）. tsunamis are grea