六年级上册Unit 4 Then and now教案

Unit4 Then and now

(Grammar time& Fun time)

 教学目标：

1. 掌握could, couldn’t, ago的用法；
2. 掌握部分不规则动词的过去式；
3. 能在具体情境中区别使用一般过去时和一般现在时；
4. 能够就自己、他人及生活的变化展开简单的英文表述；
5. 在话题讨论和课堂学习中能够感悟到时间带给我们的变化。

教学重点：

1. 掌握could, couldn’t, ago的用法；
2. 掌握部分不规则动词的过去式；
3. 能在具体情境中区别使用一般过去时和一般现在时。

教学难点：

1. 能够就自己、他人及生活的变化展开简单的英文表述；
2. 在话题讨论和课堂学习中能够感悟到时间带给我们的变化。

教学准备：

1. 学生准备两张以前和现在的照片
2. 作业纸

教学过程：:

Activity One : Lead in

1.Free talk

T: I’m your new teacher today. So do you want to know sth. about me?

3. Play a game

Here are some sentences. If you think it is right, you can say Yes, Yes, Yes. If it’s

wrong, say No, No, No.

1. Seventeen years ago, I could teach.
2. A week ago, I couldn’t speak English.
3. I couldn’t drive twenty years ago.
4. Three days ago, I was very short.

【设计意图：教师在知识结构化建构的基础上，运用游戏来激活课堂氛围，引导学生对已学知识进行结构化运用。】

Activity Two : Presentation

1. Look and learn

    T: Now you have a general idea of me. Let’s look into these sentences again. Here...

(1). could/ couldn’t

(1)   The verb stem of “could” is ...(can).

(2)   The full form of  “couldn’t” is ...(could not).

(3)   “could” and “couln’t”, they’re both... (情态动词)

(4)   So after “could” and “couldn’t”, we should use... (动词原形)

(2).ago

T: Let’s look into them again. These four sentences all include a same word ...( ago)

 Q: Where does “ago” place in the sentence? Please look into sentence1,2 and 4. And what about sentence3? Can you find the rule?

【设计意图： 呈现句子，让学生在语境中理解并掌握could、 couldn't 以及ago的用法。】

  Lerning tip2: ago表示时间的短语，既可以放在句首,与后面的句子用逗号隔开；也可放在句末。

              Exercise: Sentence3: I couldn’t drive twenty years ago.

                               = Twenty years ago, I couldn’t drive.

        Q: When do we use “ago”?

            A. Simple present tense     B. Simple past tense

               (一般现在时)             （一般过去时）

【设计意图： 呈现句子，让学生在语境中理解一般过去时和一般现在时。】

2. Look and compare

      T: Now let’s compare these two tenses and try to find the differences between

them.

OK. Boys and gils, if you can find the two differences, I’ll give you a prize. Do you want it?

I can give you some tips. Here’s a table of changes of Mike’s family we lerned last lesson. You can find some clues from it.

Tip1: The left is things happend many years ago. The right is things happen

now.

Tip 2: Pay attention to the words in rend and blue.

【设计意图： 呈现句子，让学生在语境中理解并区分一般过去时和一般现在时。】

3. Watch and fill in blanks

      Prize: watch a well-know story The Ugly Duckling

1. In the past, the duck         ugly. 

2. His brothers and sisters          like him.

3. He           fly. But he could swim very well.

4. His friends, the cat and the hen all            at him.

So he felt sad. 

5. Now it is spring. The duck can             .

  He ___ a beautiful swan now!

4.Quick respnese

T: This is the change of Ugly Duckling. Do you want to see my changes in

these yaers? But you must do a task well first. If you can do it excellently, I’ll show you my photo twenty years ago. Here’s the task and rules.Are you ready?（迅速说出下列单词的过去式或原形）

is, flew, take, wear, lose, see, get, went, do, eat, am, were, buy

【设计意图：掌握部分不规则动词的过去式  。】

Activity Three : Consolidation

1. Look and say

A photo of teacher twenty yaers ago. Describe me.

2. Listen and choose

  T: Here are more photos. But not all of them are me. Let’s listen and pick my right

photo out.

  (1) Which was I twenty years ago?

  (2) What about five years ago?

【设计意图：能在具体情境中区别使用一般过去时和一般现在时  。】

3. Show time

  T: OK. These are my change. What about you? Now take out your photos. Look and

say something about you in the past and now. Prepare it for 3minnutes.

( Listen and say: One introduce and others listen, the say somthing about him or her)

Discussion

  Is it good to grow up? Why?

【设计意图：够就自己、他人及生活的变化展开简单的英文表述.】

4.Read and say

T: We all change a lot. There are many other changes in our life. Let’s find. Read the four sentences, and choose one as you like. Try to say something about changes in our life.

1. Many years ago, children could play with friends, but now_____________.

2. Many years ago, people ate dumplings, but now__________________.

3._____________, _________________, but now......use....

4._____________, _________________, but now......go... by...

T: With time goes, everyone and everthing changes. So Time changes our life.

【设计意图：在话题讨论和课堂学习中能够感悟到时间带给我们的变化..】

Check out time 《课课练》

完成课课练P50的C部分、P51 D部分

 Homework

1.Write something about you in the past and now.

2. Make a summary of irregular past tense forms of verbs.

       （总结不规则动词过去式）