Unit 8 Natural disasters.(Grammar)

课件31张PPT。Unit 8Natural disastersGrammarWhat were you doing at 7 o’clock last night? I was doing some housework.I was having dinner.ExerciseWhat were you doing between 7 o’clock and 9 o’clock yesterday? zxxkI was doing my homework.I was watching TV.What was your father doing when you came back home yesterday?He was cooking.What was your brother doing
when you saw him half an hour ago?He was playing computer
games.What were they doing at that time last week?They were shopping.How about them?They were having a picnic.过去进行时主要表示：
? 在过去某一时刻正在进行的动作
They were eating breakfast at 7:00 am
yesterday.
(b) I was writing a letter at this time
yesterday.
(c) Five minutes ago, Danny was looking
out of the window and Suzy was
reading a book.Past continuous tense? 在过去某段时间一直在进行的动作
(a) From 1983 to 1998, he was teaching
at Yale.
(b) They were building a dam last
winter.Past continuous tense 2. 过去进行时的句式
(1) 基本结构：was / were + verb-ing
(2) 否定式：was / were not + verb-ing
was not = wasn’t were not = weren’tI was doing some shopping.
People were running wildly.I was not reading.
People were not running wildly. (3) 疑问句：将 was / were 调到主语前
结构为:Was/Were+主语+verb-ing?
回答：Yes, 主语+was/were.
No, 主语+ was not/wasn’t.
were not/weren’t.Was he running?
Yes, he was. / No, he wasn’t.Were they running?
Yes, they were. / No, they weren’t.Past continuous tense
with ‘while’ , ‘when’ and ‘as’ I was sleeping when it started to rain.
2. I was sleeping when the earthquake
started.Look at the following sentences carefully. Pay attention to the colored parts.3. Outside, people were running in all directions while pieces of glass and bricks were falling down.
4. Hours later, as I was trying to find
way out, I suddenly heard some noise
above me.以上我们已经通过归纳总结和练习对本课的语法内容有了一定的了解，下面就让我们根据
之前练习的考察情
况进一步选择讲解
该语法项的重难点。 when, while 和 as 这三个词都有
“当……时候”的意思。
There were fewer sandstorms when my grandparents were young.
我祖父母年轻时沙尘暴要少些。Past continuous tense with
‘while’ , ‘when’ and ‘as’While Mille was watching TV, her mum was sleeping.
米莉在看电视时，妈妈在睡觉。
I saw a traffic accident as I was riding to school this morning.
今天早晨我骑自行车时看到一起交通事故。2.when 和 as 既可以指某一点时间，也可以指某一段时间，其从句谓语动词表示的动作既可以是瞬间性的，也可以是延续性的；while指一段时间，从句中的谓语动词必须是延续性的。即：指一段时间时when, while 和as都可用；指一点时间时，只能用when或as，不能用while。试比较：
When/As he woke up, it was eight
o’clock.
2. While he woke up, it was eight
o’clock.
3. When/While/As I was waiting for a
bus, I met her.×√×3. 当 while , when 和 as 放在句首时，
两个句子应用逗号隔开。When the teacher came in, we were talking.
While the pig was dancing, the rabbit was jumping.
As the two men were leaving, a message arrived.Playing in the snowLook at the picture on page 98, and describe what the students were doing when Simon arrived. Use the words in brackets to help you. ______ Simon ________ (arrive), Amy ____________ (get) some snow from the ground.
2. _______________ Suzy and Kitty
_____________(build) a snowman,
Millie ____________(take) photos.
3. Daniel ____ (fall) over ____________
he ____________ (make) a big snowball.Whenarrivedwas gettingWhen/While/As was building was takingfellwhen/while/aswas making4. Peter _____________(hide) behind
a tree ______ a snowball ___
(hit) him.
5. ________________ Millie and her
classmates _____________ (play) in
the snow, Andy _____ (run) towards
them.was hidingwhenWhen/While/Aswere playinghitranPlease click here --- What were you doing this time
yesterday?
--- I _____ on the grass and drawing a
picture. [2011北京]
A. sit B. sat
C. am sitting D. was sittingI. Multiple choice.2. When I came back yesterday evening, my brother _____ his homework.
[2011长沙]
A. is doing B. has done
C. was doing
3. --- I called you at 4:00 yesterday afternoon, but no one answered.
--- Sorry, I _____ with my friends at that time. [2011河南]
A. swim B. swam
C. will swim D. was swimming4. --- Amy, I called you yesterday evening,
but nobody answered the phone.
--- Oh, I ____ a walk with my mother at
that time. [2011宁波]
A. take B. took
C. am taking D. was taking
5. He _____ when the UFO arrived. He didn’t wake until the UFO disappeared. [2011枣庄]
A. slept B. was sleeping
C. was doing homework D. was singingII. Fill in the blanks.
People ___________ (run) wildly while pieces of bricks __________ (fall) down.
We should prevent hunters from ___________ (catch) wild animals.
Natural disasters may ________ (cause) by bad weather.
Our maths teacher warned us _________ (not copy) other’s answers.
The temperature _______ (drop) a lot today.were running
were fallingcatchingcausenot to copydropsIII. Translate the following sentences
into English. 当开始下雨的时候，我正和朋友们在
操场上打篮球。I was playing basketball with my friends in the playground when it started to rain.2. 我当时甚至不知道我正在做什么。I did not even know what I was doing at that time.3. 当我妈妈在做晚饭的时候，我在卧室
做作业。I was doing my homework in the bedroom while my mother was cooking supper.4. 当我今天早上看到她时，她正急匆匆
地赶去上班。When I saw her this morning, she was in a great hurry to go to work. 5. 他在十五岁写出了第一部小说。
When he was 15, he wrote his first novel.
6. 若是天气好的话, 我总是到乡下去。
I always go to the country when the
weather is good.
7. 昨天下午三点，我正在上课。
I was having a class at 3:00 p.m.
yesterday.
8. 上周这时候你正在干嘛？
What were you doing at this moment
last week?9. 当她下公交车时，我看到了她。
I saw her as she was getting off the bus.
10. 当我正看菜单的时候，那个男的走向我
们的桌子。
As I was reading the menu, the man
come to our table.Reflection1. 过去进行时主要表示：
? 在过去某一时刻正在进行的动作
? 在过去某段时间一直在进行的动作
2. 过去进行时的句式
(1) 基本结构：was / were + verb-ing
(2) 否定式：was / were not + verb-ing
(3) 疑问句：将 was / were 调到主语前
3. 连词 while, when and as 与过去进行时