教材分析（教学要求）
重点1   million
a hundred                   100
a thousand                  1,000
ten thousand                10,000
a million                    1,000,000
重点2   -if句
上个学期，我们曾经学过由if 引导的句子，你还记得吗？对了，“ I’ll not go to the zoo if it rains tomorrow. ( 假如明天下雨，我就不去动物园。) You can come to the party if you don’t wear jeans.（ 如果你不穿牛仔裤，你就能来舞会。）” 这个学期又在本单元见到了似曾相识的同样由if引导的句子，比如：“If I won the lottery, I would give it to medical research. （ 假如我赢了彩票的话，我就捐给医学研究。） If I were you, I would wear jeans and T-shirt.（ 如果我是你，我就穿牛仔裤和T恤。）”
这两个单元学到的句子都是由if引导的。那么，它们有什么区别呢？
对了，分两种情况：
1．something may possible happen 
某事发生的可能性较大。
这种情况，有个十三字口诀：“主将从现，主过将从过，主现从现”。即主句是一般将来时，从句用一般现在时；主句用过去将来时，从句用一般过去时；当主句中有can/can’t的话，则从句用一般现在时。例如：
If he has time, he will come tomorrow.
If she finishes early, she can come back early.
If you don’t do homework, the teacher will scold you.
2．it is just imaginary, and nothing will happen 某事只是想象的，并不会发生，或者发生的可能性很小。则要用我们常说的虚拟语气。例如：
If he were kind, he would help me with it.              (He isn’t.)
If I had more money, I would buy all of them.          (I don’t.)
If he were generous, he would give us a good treat.     (He isn’t.)
If you were tired, you would find a good job.           (You aren’t.)
If I were you, I would buy the dearest one.            ( I am not.)
任务设计
任务I.  请用正确的形式填空。
1. If I come, I ________ ( see ) you.
2. If it is fine, we______( go ) for a walk.
3. If it rained, they _________ ( stay ) at home.
4. You will spoil it if you ______ ( not be ) careful.
5. We would be very much pleased if you _____( come ).
6. Will you help me if I _____ ( need ) you.
7. They will get wet if it _____ ( rain ).
8. What a pity I haven’t got my car. If I had, I _________( take ) you to the airport.
9. We would answer if we _____( can ).
10. If you eat too much, you ______( get ) ill.
任务II.  请根据给的线索将下列句子补充完整。
A．eg.      If I were poor, I would do my shopping in cheaper stores.
1. If I were trapped in a lift,____________________________.
2. If I had a flat tire on my way home,_____________________.
3. If I heard a noise outside my apartment in the middle of the night, 
________________________________________________.
4. If someone was following me down a dark street, _________________.
5. If I were short of five yuan for a tennis racket, __________________.
6. If I found a wallet in the street with a lot of cash in it, __________.
B. eg. If I won one million dollars in the lottery , I’d put it in the bank and   watch it grow.
_____________________________, I’d leave my home city.
2.______________________________ , I might not speak to you again.
3._______________________________, I’d be very miserable. 
4. _______________________________, I’d be frightened. 
5._______________________________, I’d be extremely happy. 
任务III.  综合题：请根据上下文完成对话。
1. A: What are you doing this evening?
  B: I’m not sure. If there _____ ( not be ) anything good on TV. I think I _______(read) a detective story. Or maybe I______  ( go ) to bed  
early.
2. A: What time will Kate be home?
   B: If I ________(know) I ________(tell) you. But unfortunately, she didn’t say a word with me because we argued yesterday.
   A: Well, if she _____(get) home before 10:00, please ask her to call me.
3. A: I’m so stressed out.
   B: It’s none of my business, but if I ________( be )you, I _______( take ) some time off.
4. A: I’m afraid your flight has been delayed due to bad weather.
  B: Oh no! When will it take off?
  A: We don’t have any idea yet. If it_________ ( stop ) snowing this evening, then your flight _____________ (depart) some time tonight.
A: What are the chances that will happen?
B: It’s too early to tell. I ________( let ) you know if I ______( hear ) any news.
任务IV. 开放性试题 （任选一题）
What would you do if you had a lot of money?
If I were the headmaster of my school, I would…
参考答案及分析
重点2 
任务I
1. will see,    2. will go     3. would stay      4. are not      5. came
6. need       7. rains      8. would take      9. could       10. will get
任务II.  A.
I would call up the
初三英语上册unit 4知识点复习.doc