一、教学目标
1．知识目标
区别一般过去时态和过去进行时态。
2．能力目标
能够区分在什么情况下用过去时态，什么情况下用过去进行时态。
3．情感目标
教育学生要注意交通安全。
二、教具
录音机；在教室一角布置一个“交通事故现场”。
三、课堂教学设计
1．复习 教师检查课文复述。
2．要求学生四、五人就近一组。其中一位同学扮演警察，手持一个“记录本”；其他同学以“见证人”的身份向“警察”纷纷叙述事故发生的经过。四、五分钟以后，请两个大组到布置好的地点去表演。
教师也可考虑将学生分为若干个小组，分别扮演以下角色和准备以下内容：
1）李磊叙述事情经过；2）看门人叙述事情经过；3）赵老师叙述事情经过；4）骑摩托车人叙述事情经过。
以下提示供教师备课时参考：（可用投影形式展示）
角色1 (Li Lei) left school and saw a bag fall off a truck; shouted to the driver, but the driver did not hear; a man on a motorbike hit the bag and fell off; came up to help; asked the girl students to stop the traffic; helped to carry the man to the gate keeper's room, went to find Miss Zhao
角色2 (the gate keeper) heard the children shouting outside the school gate; went out to see what happened; saw two boy students carry a man; asked the people not to crowd around the man; asked Li Lei to find a teacher; moved the bag of rice away with Lin Tao
角色3 (the man on the motorbike) rode too fast that day; saw the bag, but too late; had an accident and fell off; hurt, could not move; two boys came to help; a teacher came with a medicine box; took me to a hospital
角色4 (Miss Zhao) reading a book at the library; Li Lei ran in and looked worried; told me about the accident; asked Li Lei to telephone the police; went to find a medicine box; quickly ran to the gate keeper's room
3．全体同学填写“事故报告”，教师应要求学生完全用书面形式答出。当堂核对答案。
4．教师扼要讲解一般过去时态与过去进行时态的区别（见难点讲解）。
5．打开练习册，给学生一分钟时间看听力练习提示。听录音三遍，当堂核对答案。
6．指导学生做练习册其他习题。
7．布置作业
1）继续准备第18课课文复述；2）书面完成练习册其他习题。
四、难点讲解
过去进行时态和一般过去时态的区别：
过去进行时态表示过去某一时刻正在进行的动作，而一般过去时态表示一个完成的动作。请比较以下两组句子：
I was writing a letter last night. 昨晚我在写一封信。（信可能没有写完）。
I wrote a letter last night. 昨晚我写了一封信。（信已经写完）。
I was doing my homework when he phoned me. 他给我打电话时，我在写作业。（表示当时没做其他事情）。
I did my homework and went to bed. 我写了作业然后睡觉了。（表示说话人所做的两件过去的事情）。
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