(共27张PPT)
Unit 4 Christmas
Lesson 20 Christmas Tree
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目 录
—CONTENTS—
1. Let’s put up a Christmas tree!
PART ONE
2. Let’s do it!
PART TWO
4.当堂检测
PART FOUR
3. Walk, walked and be going to walk
PART THREE
话题引入
1. Let’s put up a Christmas tree!
PART ONE
课文学习
Jenny: Yesterday my dad bought a Christmas tree!
Let’s put it up. It’s fun.
Li Ming: First, I’m going to put the lights on the tree.
Jenny: Then I’m going to put Christmas things on the tree.
Jenny: Now, we put our gifts under the tree.
Danny: The star always goes on top!
There! It’s done!
Li Ming: It’s beautiful.
知识点 1
知识精讲
Yesterday my dad bought a Christmas tree!
昨天我的爸爸买了一棵圣诞树！
此句时态为一般过去时，bought是buy的过去式。一般过去时的意义及用法如下：
一般过去时表示过去某个时间里发生的动作或存在的状态，常与表示过去的时间状语连用，如：
yesterday，last week，in 1993等。
意义：
知识精讲
（1） 含有be 动词的一般过去时：
①肯定句：主语+was（were）+ 其他．
例句：I was late yesterday. 昨天我迟到了。
②否定句：主语+was（were）+ not + 其他．
例句：We were not busy yesterday. 我们昨天不忙。
③ 一般疑问句：Was（Were）+ 主语+ 其他
例句：Were you ill yesterday 你昨天生病了吗？
肯定回答：Yes, I was. 是的，我生病了。
否定回答：No, I wasn’t. 不，我没生病。
用法:
知识精讲
（2）含有实义动词的一般过去时：
①肯定句：主语+ 动词过去式+ 其他．
例句：I went home at nine o’clock yesterday.
我昨天九点钟回家的。
②否定句：主语+ didn’t + 动词原形+ 其他．
例句：I didn’t go home yesterday. 我昨天没回家。
③ 一般疑问句：Did+ 主语+ 动词原形+ 其他？
例句：Did you go home yesterday 你昨天回家了吗？
肯定回答： Yes, I did. 是的，我回家了。
否定回答：No, I didn’t. 不，我没回家。
知识精讲
变化规则 例词
一般动词词尾加-ed look — looked
wash — washed
以不发音的字母-e结尾的动词词尾加-d live — lived
dance — danced
以重读闭音节结尾，且末尾只有一个辅音字母的动词要双写辅音字母再加-ed stop — stopped
shop — shopped
put —putted
以“辅音字母 +y”结尾的动词要变 y为 i 再加-ed study — studied
carry — carried
（3）动词变过去式的规则变化：
知识点 2
知识精讲
put up 装饰；张贴
Let’s put up the Christmas tree.
让我们装饰圣诞树吧。
例句：
put up 是动词put和副词up构成的“动副型”短语，如果要接名词，名词可以放在 put 和 up 的中间，也可以放在up的后面；如果要接代词，代词必须放在put和up的中间。
易错点
提示
知识精讲
put up 还有“举起”的意思。
拓展
例句：
This is a Christmas tree. Let’s put it up.
这是一棵圣诞树。让我们装饰它吧。
知识点 3
知识精讲
then / en/ adv. 然后；接着
First we make a big snowball. Then we make a small snowball. 首先我们制作一个大的雪球。
然后我们制作一个小的雪球。
例句：
than（prep.）比 they（pron.）他 /她/它们
形近词：
t + hen（母鸡）= then
加法记忆法：
2. Let’s do it!
PART TWO
课文学习
Draw and write.
Yesterday I bought a Christmas tree.
Tomorrow I’m going to put it up.
____________________________
____________________________
____________________________
Yesterday I bought a Christmas lights.
Tomorrow my father and I are going to put them on our Christmas tree.
知识点 4
知识精讲
tomorrow /t 'm r / n. & adv. 明天；
明日；在明天，在明日
Tomorrow I’m going to buy a dress.
明天我打算买一件连衣裙。
例句：
tomorrow常与一般将来时连用。
用法：
短语：
tomorrow night 明天晚上
tomorrow morning 明天早上
知识精讲
today，today 是今天，tomorrow，tomorrow 是明天。
yesterday，yesterday 是昨天，我们 happy 每一天。
魔法记忆：
3. Walk, walked and be going to walk
PART THREE
课文学习
Let’s find the differences!
Yesterday
Danny walked to school.
Mrs. Smith bought a scarf.
I brought a Christmas tree to my family.
Often
Danny walks to the bus stop.
Mrs. Smith buys some gifts.
I bring some lights for the Christmas tree.
Tomorrow
Danny is going to walk to the park.
Mrs. Smith is going to buy some food.
I am going to bring a star for the tree.
知识点 5
知识精讲
一般现在时、一般将来时的用法
一般现在时
一般现在时表示经常发生的动作或存在的状态，通常与表示频率的副词（如：often，sometimes，usually，always等）连用。如果句子中的动词是be动词，可以用am，is，are。如果句子中的动词是行为动词，主语是非第三人称单数，那么行为动词要用原形。
知识精讲
如果句子中的动词是行为动词，且主语是第三人称单数时，那么句子中的行为动词也要用第三人称单数形式。Jenny likes to sing songs.詹妮喜欢唱歌。
易错点
提示
典型例题
Mr. Li ________（like）to go for a walk
with his family.
likes
点拨：
这句话的主语Mr. Li是第三人称单数，句中的谓语动词like也要用第三人称单数形式，即likes。句意为：李先生喜欢和他的家人一起去散步。
知识精讲
一般将来时表示将要发生的动作或将来存在的状态，通常与表示将来的时间状语（如：tomorrow）连用，其结构是“主语+ am / is / are going to +动词原形+其他. ”。其中be going to是现在进行时表将来，表示“将要……”。
一般将来时
I’m going to make breakfast tomorrow.
明天我将要做早饭。
例句：
4.当堂检测
PART FOUR
当堂检测
一、用所给单词的适当形式填空。
（1）— ______（are）they at school yesterday
—Yes, they______ （are）. /
No, they ________（are）.
（2）_______（do）you _______ （go） to work last weekend
（3）— _______（do） he ______（buy） a gift for his mother
—Yes, he did. / No, he________（do）.
Were
were
weren’t
Did
go
Did
buy
didn’t
当堂检测
二、按要求完成下列句子。
（1）She ate good food last Sunday.（变为一般疑问句）
________ she ________ good food last Sunday
（2）did，do，yesterday，you，what （ ）（连词成句）
___________________________________
Did
eat
What did you do yesterday
课堂小结
本节课我们学习了以下知识，请同学们一定加强巩固，以便能和同学们进行灵活交流哦！
重点词汇：tomorrow, then
重点短语：put up
重点句式：Yesterday my dad bought a Christmas tree!
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Unit 4 Christmas
Lesson 20 Christmas Tree
教学目标：
(一)知识目标
掌握四会词汇：yesterday, tomorrow, today, be going to 知道怎样装饰圣诞树。
(二)能力目标
1.要求能够熟练地向他人描述某人昨天做了哪些事情；今天做什么事情；明天打算做什么事情。
2.能够用所学词汇和句子进行对话，能烘托出装饰圣诞树时的气氛。
(三)情感目标
让学生多了解西方国家的节日，看一看西方国家的节日与中国的有哪些异同点。
教学重点：
四会词汇：yesterday, tomorrow, today, card, be going to
教学难点：
区分一般现在时、一般过去时和一般将来时这三种时态。
教学准备：
图片、圣诞树，录音机
教学过程：
Step1: Warm-up
1. Greeting and Revision
Hello! How are you What’s the date today What’s the date
yesterday
2. Free talk
What do you often do
What does he/she often do
What did you do yesterday
What did he/she do yesterday
Step 2: Presentation
1.导入文本新知
(1) Listen and answer
T: Class, do you want to know something about our friends Now let's listen and try to answer.
教师播放音频。学生听音找出答案，回答老师问题，并复习一般过去时态，掌握不规则变化的动词过去式。
a. What does Danny/Mrs. Smith/ Mr. Wood often do
b. What did Danny/Mrs. Smith/ Mr. Wood do yesterday
教授过去式buy-bought bring-brought
2.学习一般将来时
(1) 教授单词tomorrow
Today is December 24th.
Tomorrow is December 25th.
教师带读新单词。
(2) 结构：be going to do
T: I am going to play ping-pong/ buy gifts tomorrow.
What are you going to do
S: I am going to_________.
T: What is he/she going to do tomorrow
S: He/ She is going to ______.
总结一般将来时态结构be going to do.语法渗透。
(3) Exercise
PPT出示三种时态动词的变化,对三种时态的动词变化加以巩固。e.g.: walked-walk- be going to walk
Let’s find the differences.
(4) Practice
出示各种人物的图片，给出时间yesterday ,today , tomorrow,让学生用三种时态描述图上内容，如：He /She /They ______ yesterday.
He /She/They_______ today.
He is/She is/They are going to _____ tomorrow.
3.听录音学文本
(1) Listen to the questions:
a: What is Danny going to do
b: What is Mrs. Smith going to do
c: What is Mr. Wood going to do
(2) Discuss in pairs.
(3) Ask the students to answer the questions.
4. Let's put up a Christmas tree.
(1) 新授短语put up
T: Yesterday Jenny’s father bought a Christmas tree. These are Christmas things. What is she going to do
S: She is going to put the Christmas things on the tree.
T: Yes. She is going to put up the Christmas tree.
学生跟读句子。
(2) 新授单词then
T: How to put up the tree Now let's watch the flash.
观看flash后PPT 出示圣诞树图片，分步展示如何装饰圣诞树,引导学生分步骤描述。
First, I am going to_____. Then I am going to_____.带读单词与句子。
It’s done.
It’s _________.
(3) 分角色朗读课文。
5. Draw and Write
(1) Draw yourself
老师提供课文第二部分Let's do it 中的图片与例句，让学生仿照来写并画出自画头像与所做事情。
Yesterday I___________.
Tomorrow I __________.
(2) Ask and draw your friend.
T: Let’s make a chart by ourselves, what did your friend do yesterday, and what is he/she going to do, try to fill in your
chart with your friend. You can leave your seat and ask,
then write them down.
Yesterday he/she________. Tomorrow he/she_______.
(3) Show and read your chart.
Step 3: Homework
采访家人与朋友，用英语询问昨天做过什么、明天将要做什么，制作出表格记录下来。
板书设计：
Lesson 20 Christmas Tree
What did you do yesterday I brought… I bought…
What are you going to do tomorrow
I am going to __________.(do)
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