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教学设计
课程基本信息
学科 英语 年级 八年级 学期 春季
课题 8B Unit 3 The world at one click (Grammar)
教学目标
通过本课时的学习，学生能够： 1. 了解一般过去时和现在完成时在形式特征上的区别； 2. 借助时间轴表、用法提示和例句，梳理、归纳一般过去时和现在完成时在表意功能上的区别； 3. 准确使用一般过去时和现在完成时介绍线上旅游经历，深入了解线上旅游的优势。
教学内容
教学重点 掌握一般过去时和现在完成时在形式特征上的区别，能够准确识别两种时态的动词形式（过去式与过去分词）。 熟练运用时间轴、用法提示和例句，梳理并归纳两种时态在表意功能上的三大区别（动作是否持续、是否强调结果、是否说明次数）。 完成教材Part A、B、C的练习任务，准确运用两种时态描述线上旅游经历或真实旅行经历。 教学难点 灵活运用两种时态描述线上旅游经历，根据语境准确判断何时使用一般过去时（单纯叙述过去事件）、何时使用现在完成时（强调对现在的影响或结果）。 准确理解并运用现在完成时表示“动作从过去持续到现在”和“强调过去动作对现在的结果”这两种易混淆的用法，做到概念清晰、运用得当。 结合真实语境（如Mark一家的旅行计划），自主创编包含两种时态的语篇，满足语法准确性和语篇连贯性的双重要求。
教学过程
Presentation 1. Have students read Mark’s message on page 40 and answer the following questions. (1) What are the parts of speech of the words in bold (2) What are the forms of these verbs And which tense are they used in 2. Have students read the differences between the simple past tense and the present perfect tense on pages 40–41 and finish some tasks. (1) Have students read the first difference and answer the following questions. What does the first sentence tell us What does the second sentence tell us (2) Have students make two sentences according to the first difference. (3) Have students read the second difference and answer the following questions. What does the first sentence tell us What does the second sentence tell us (4) Have students make two sentences according to the second difference. (5) Have students read the third difference and answer the following questions. What does the first sentence tell us What does the second sentence tell us (6) Have students make two sentences according to the third difference. 3. Have students read the tips on page 40. 4. Have students finish “Work out the rule!” on page 41. Practice 1. Have students finish Part A on page 41. 2. Have students finish Part B on page 41. 3. Have students finish Part C on page 42. 4. Have students read the following sentence in Part C and answer the following question. - Dad has explored different tourist attractions online to plan our family trip to China. What is the reason for not using the simple past tense here Production 1. Have students answer the following questions. (1) According to Part A, Part B and Part C, what can we do during the online visits (2) Will Mark’s family go on a visit online or travel to China in person 2. Have students write some sentences about an online trip or a real trip, using the simple past tense and the present perfect tense. Assign homework: Compulsory homework: Write down your online or real trip, using the right tense; Optional homework: Polish your writing work and share it with your friends.

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