策略：英语语法教学

教学目标：呈现

教学过程：

Step1: Ask students to read the passage , and find  the tenses which used in paragraph.

Step2: Ask them to work in groups of four and read the passage again trying to find out what kind of tenses are used in paragraph.

Step3: Conclusion: in the present tense the verb form is: am/is/are, do/does, in the past tense the verb form is: was /were, did.

Step4: Ask students to read the passage once again, and try to find out why different tenses are used in different paragraph.

分析： 第一步通过阅读文章学习时态，这样可以更容易发现问题。第二步通过讨论，进一步能判断文中所使用的时态 第三步通过总结，让学生明白动词形式是如何发生变化的。 第四步 通过文章上下文对比，发现动词产生变化形成不同的时态的原因是因为所表示的时间不同。