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IV. Teaching preparation: PPT, a computer
Step 1 Warming up and leading in
(1) Listen to an English song “I still haven't found what I'm looking for”
(2) Simply talk about the song. (some sentences)
(3) Ask some questions about the part of Reading
① How long has Mr Chen lived in Sunshine Town?
② Can Mr. Chen see his old friends as often as before? Why?
(4) Present the answers on the screen.
① He has lived there since he was born.
② No. Because most of his old friends have moved away.
(5) Ask Ss to pay more attention to the underlined parts. T explains to let Ss understand the structure “have/has+past participle”.
（设计意图：通过有针对性地听英文歌曲和对Reading部分内容的复习，使学生对现在完成时有初步的了解，同时也为新课导入做铺垫）
Step 2 Presentation
1) Explain the use of the present perfect tense.
①.表示动作发生在过去并与现在有联系。（We use the present perfect tense to talk about an action that happened in the past and has a connection with the present.）
eg. I have written some words on the blackboard already. (现在的结果是：字还在黑板上了)
I have just had my breakfast.（结果是：现在我不饿）
② 表示过去已经开始持续到现在或将来的动作或状态。（We use the present perfect tense to talk about an action that started in the past and continues to the present.）
eg. I have been a teacher since I left my college (大学).
I have been a teacher for about 20 years.（现在我还是一位教师）
③ 表示某事直到现在已经发生了多次。（We also use the present perfect tense to talk about how many times an action has happened till now .）
eg. I have watched the TV show many times.
(设计意图：层层深入、中文讲解、英文举例，帮助学生更好地认识现在完成时的句式结构，让学生根据这些句子更好、更加容易地理解现在完成时）
2）Practice on PPT
(设计意图：通过听说多种形式进行操练，从而让学生对所学内容得到及时巩固。）
3）Show the following words: already, yet, since, ever, never, just, for and recently by PPT.
1) already “已经”，放在肯定句句中或句末；
2) yet放在疑问句句尾时，表示“已经”；放在否定句句尾时，表示“还(没，不)”
3) ever “曾经”，用于疑问句或否定句中；
4) never “从来没有”，表示否定句中。