资源简介

(共17张PPT)
UNIT 5
Nature’s Temper
Section A 4a-4d
Grammar Focus
Learning objectives
一、知识目标
掌握本课重点词汇与短语：typhoon, have trouble, be dangerous to, move…off, store food and water 等。
掌握 过去进行时 的基本用法。
掌握时间状语从句：when / while / 引导从句。
二、能力目标
能读懂对话，获取台风经历与准备措施的信息。
能正确运用和过去进行时描述过去的经历。
能使用 when/while/ 连接句子，描述先后或同时发生的动作。
三、情感目标
了解自然灾害安全常识，增强自我保护意识。
学会用英语表达关心与安慰。
四、教学重难点
重点：过去进行时、when/while/ 从句。
难点：过去进行时, when 和while区分使用。
What were the two old man doing when the typhoon hit
They _______________ (play) chess.
were playing
What was man doing when the typhoon hit
He ___________ (read) newspaper on the bench.
was reading
What was boy doing when the typhoon hit
He ___________ (lie) under a tree.
was lying
What was the two kids doing when the typhoon hit
They ___________ (play) with sand.
were playing
行业PPT模板http://www./hangye/
行业PPT模板http://www./hangye/
单击此处编辑母版标题样式
单击此处编辑母版文本样式
单击此处编辑母版文本样式
二级
三级
四级
五级
小红书：Christina在努力
原创课件
Read the sentences. Underline the verbs which show an ongoing action in the past.
What were you doing while it was snowing heavily I was travelling on the train then.
What were your family doing when the typhoon hit My children and I were reading together.
When my neighbour called, my family were having dinner. We were driving home when the strong winds started. While we were driving home, the strong winds started. It was raining hard while we were driving back.
4a
过去进行时：
1. 概念：表示过去某一时刻或某段时间内正在进行的动作。
2. 构成：was/were + 动词现在分词
下大雪的时候你在做什么？
那时我正坐火车旅行。
台风来袭时，你的家人在做什么？
我和孩子们在一起读书
邻居打来电话时，我们一家人正在吃晚饭。
我们正开车回家，突然刮起了大风。
当我们开车回家的时候，刮起了大风。
我们开车回去时，雨下得很大。
句型 结构公式 示例
肯定句 主语 + was/were + doing I was reading a book at 8:00 yesterday evening.
否定句 主语 + was/were + not + doing She was not (wasn't) watching TV at that time.
一般疑问句 Was/Were + 主语 + doing Were you doing your homework when I called
特殊疑问句 疑问词 + was/were + 主语 + doing？ What were they doing？
过去进行时的结构
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：read 、work、study、drink、eat等。
非延续性动词指动作极为短暂，瞬间结束。
如：come、start、begin、hit、jump、knock等。
Let’s learn
1)when可以表示时间点，也可以表示时间段，后面既可以+延续性动词，也可以+非延续性动词，时态既可以是一般过去时，也可以是过去进行时。
2)while仅表示时间段，引导表示过去的时间状语从句时，从句的动词必须是延续性动词，时态用过去进行时。
E.g. He fell asleep while he was watching TV.
The fire alarm went off while we were having a meeting.
主句（瞬间动作）+ while + 从句（持续动作）
3)当主句和从句都为过去进行时，只能用while引导，不能用when。
E.g. We were playing basketball while it was raining.
主句（持续动作） + while + 从句（持续动作）
记忆口诀：
when后“可长可短”（过去进行时、一般现在时都可以）
while后“只能长”（只能用过去进行时）
两个动作都是“长动作”（过去进行时），用while
I did my homework. The typhoon landed on the coast.
The power went out. My father and I made dinner.
Kate wrote a letter. Her brother called to warn her of the storm.
My parents packed the supplies. I moved our things off the floor.
I slept soundly. It rained cats and dogs.
4b Combine each pair of sentences using when or while.
Step One
圈出两个句子的动词
判断是：
短动作（瞬间发生）
长动作（持续一段时间）
短动作
长动作
短动作
长动作
长动作
短动作
长动作
长动作
长动作
长动作
Step Two
选连词
长动作 + when + 短动作
While + 长动作，短动作
when + 短动作 / 长动作都可以
while 后面只能加长动作（过去进行时））
when
when
while
when
while
小口诀
长动作 when 短动作，
While 只跟长动作。
两个都长用 while，
时态别忘要分清。
Step Three
变时态
长动作 → was/were + doing
短动作 → did（一般过去时））
Step Four
按结构连成一句，检查通顺。
1.I did my homework. The typhoon landed on the coast.
→ I was doing my homework when the typhoon landed on the coast.
2.The power went out. My father and I made dinner.
→ My father and I were making dinner when the power went out.
3.Kate wrote a letter. Her brother called to warn her of the storm.
→ Kate was writing a letter when her brother called to warn her of the storm.
4.My parents packed the supplies. I moved our things off the floor.
→ While my parents were packing the supplies, I was moving our things off the floor.
5.I slept soundly. It rained cats and dogs.
→ While I was sleeping soundly, it was raining cats and dogs.
4c Complete the passage with was, were, when, or while.
When Jenny looked up, thick black clouds were forming in the sky, and the rain ______ beating against their roof.
“Quick, this way,” said Dad.
The family ran to the safe room at once. ______ they were waiting, Jenny's little sister started to cry. Dad gave her some chocolate and told her that they ______ hiding from an angry lion. Soon, she was laughing again.
At last, the storm passed. ______ they stepped outside, they found the sun shining. People were asking one another if they were safe while some ______ starting to clear the streets. Jenny smiled. The tornado was scary, but it also brought everyone closer together.
was
While
were
When
were
4d Imagine that you are a reporter. Interview a member of Jenny’s family and find out what he or she was doing around the time of the tornado.
My family and I were hiding in a safe room.
What were you doing when the tornado hit
What were you doing while you were waiting there
Oh, while I …
"What questions would you ask "
内容（展示示范对话）：
Reporter: What were you doing when the tornado hit
Jenny: My family and I were hiding in a safe room.
Reporter: What were you doing while you were waiting there
Jenny: While I was waiting, my little sister started to cry. My dad gave her chocolate and told her we were hiding from a lion.
Reporter: That's clever! Were you scared
Jenny: A little, but we were together, so it was okay.
41
练习 用was, were, when 或 while填空，完成短文。P98
It 1. _____a typical Saturday morning. I 2. _____still sleeping comfortably in my bed 3. ______ my phone suddenly started ringing loudly. My brother 4. _____ making breakfast in the kitchen at that time. He called out, “Are you going to get that ”
I 5. _____trying to find my phone under the pillow6. ______he walked into my room with a plate of toast. Just 7. ______ we 8. ______ talking about the strange call, the doorbell rang.
It turned out to be our neighbor, Mr. Clark. He 9. _____ walking his dog 10. ______ he saw a package for us left out in the rain. What a busy but helpful morning!
was
was
when
was
was
when
while
were
was
when

展开更多......

收起↑