2021学年Section A多媒体教学ppt课件

这是一份2021学年Section A多媒体教学ppt课件，共24页。PPT课件主要包含了情景导入，生成新知，过去进行时，现在分词的构成，While ，was，When ，was ，were ，情景表演等内容，欢迎下载使用。
Where are yu?
I am in the classrm.
What are yu ding?
I am answering yur questins.
What was Ben ding when it began t rain heavily?
When it began t rain, Ben was helping his mm make dinner.
What was Jenny ding while Linda was sleeping?
While Linda was sleeping, Jenny was helping Mary with her hmewrk.
定义： 表示过去某个时刻或某一时间段正在进行或发 生的动作。
时间标志词： at this/that time yesterday, at 9:00 yesterday mrning, all night等； 或以when, while 引导的时间状语从句。
构成： 基本结构：主语+was/were + ding +其他。 否定形式：主语+wasn’t/weren’t +ding+其他。 一般疑问句：Was/Were+主语+ding+其他？ 肯定回答：Yes, 主语+was/were. 否定回答：N, 主语+wasn’t/weren’t. 特殊疑问句：特殊疑问词+ was/were +主语 +ding+其他？
以when和while引导的时间状语从句
1.延续性动词和非延续性动词 延续性动词指动作可以延续一段时间, 而不是瞬间结束。   如: wrk、study、drink、eat等。 非延续性动词指动作极为短暂，瞬间结束。 如: start、begin、hit、jump、knck等。
2.在本单元中，出现了以when和while引导的时间状语从句。when表示“当……的时候”。从句中既可用延续性动词，又可用非延续性动词，这些动词既可以表示动作，又可表示状态。从句中动作既可和主句的动作同时发生，又可在主句的动作之前或之后发生。如：Mary was having dinner when I saw her.The by was still sleeping when his mther gt hme yesterday mrning.
3.while表示“在……的时候”、“在……期间”。它强调主句的动作与从句的动作同时发生或主句的动作发生在从句的动作过程中。While从句中必须是表示动作或状态的延续性动词。如：The weather was fine while we were in Beijing.She called while I was ut.
1.一般动词在词尾加-ing，如g—ging2.以不发音字母e结尾的动词, 先去掉e, 再加-ingcme — cming  make — making   write — writing3.以重读闭音节结尾的动词，如果末尾以一个辅字母结尾，应先双写这个字母，再加ing，x和w结尾的除外。get — getting    swim — swimming  shw — shwing
4.以字母y结尾的单词，直接加ing。如：    carrying playing studying5.以字母ie结尾的动词，变ie为y，再加ing。   die → dying             lie →lying6.以元音字母加e结尾，或以e结尾，且e发音的动词， 直接加- ing。    see — seeing            be — being
使用进行时态的注意事项
1.一些动词，如see, hear, lve, like, knw,remember, understand, have等表示感情、知觉和状态的词，一般不用于进行时态。
2.在there和here引起的句子中，常用一般现在时 代替现在进行时。如：Here cmes the bus.       There ges the bell.
一般过去时态、现在进行时与过去进行时的比较：
(1)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。例句：David wrte a letter t his friend last night.大卫昨晚给他的朋友写了封信。(信写完了)(2)现在进行时表示某一动作正在发生。例句：Listen，the girl is singing in the next rm.听，那个女孩正在隔壁房间里唱歌。(正在发生)
(3)过去进行时表示在过去某一时刻或某一段时间正在进行的动作。例句：Mary was ding her hmewrk when her mther was cking.当玛丽的妈妈正在做饭时，玛丽正在做作业。(过去进行时)
Lk at the table and write sentences with bth while and when.
While Jhn was taking phts, Mary bught a drink.Jhn was taking phts when Mary bught a drink.
While Jhn was playing the pian, Mary left the huse.Jhn was playing the pian when Mary left the huse.
While Jhn was cleaning his rm, Mary turned n the radi.Jhn was cleaning his rm when Mary turned n the radi.
While Jhn was shpping, Mary tk the car t the car wash.Jhn was shpping when Mary tk the car t the car wash.
At 7:00 a.m., I wke up. ________ I ______ making my breakfast, my brther _______ listening t the radi. ______ I was eating, the radi news talked abut a car accident near ur hme. My brther and I went ut right away t have a lk. _______ we gt t the place f the accident, the car ______ in bad shape frm hitting a tree. But luckily, the driver ______ fine. The rads ______ icy because f the heavy snw frm the night befre.
Fill in the blanks with was, were, when r while.
What were yu ding at these times last Sunday? Fill in the chart. Then ask yur partner.
What were yu ding at nine ’clck last Sunday mrning?
I was sleeping. Hw abut yu?
A: I was ding my hmewrk.
B: Yu’re kidding!
Ⅰ .根据句意及汉语提示完成句子。1．Dn't ____(欺骗) yurself.It wn't be easy.2．____(结冰的) rads are dangerus.
3.当飞机起飞的时候, 天正下着大雪。It _______________heavily when the plane ____________.
4. 瞧, 孩子们正在追逐一只小猫。 Lk! The children ___________________ a small cat.5.我女儿正在写信时, 其他的孩子都在外面玩耍。My daughter was writing a letter ________the ther children ___________________utside.
were playing
are chasing after
1. 昨天早上9点钟你在干什么?2. 不明飞行物起飞时，小明正在骑自行车。3. 那时，他们正在做家庭作业。
What were yu ding at 9 ’clck yesterday mrning?
They were ding their hmewrk at that time.
Xia Ming was riding his bike when the UFO tk ff.