山东省滕州市大坞镇大坞中学八年级英语下册 Unit 6 How long have you been collecting shells Section A(3a-4)（第三课时）学案（无答案） 人教新目标版Teaching goals1.现在完成进行时的用法。2.Patterns: How long have you been doing sth ? I have been doing sth since . I have been doing sth for (period of time) . 3.谈论人们的业余爱好及持续多长时间。Important and difficult points1.Words and expressions on P46 .2.现在完成进行时的用法以及与过去时的区别。Teaching procedures:Step 1 Leading in）Ask some students the questions: How long did you skate ?How long have you been studying English ?Step 2 Pre-task.SB Page 46 , 3a .1.Ask Ss to read the passage and fill in the table .2.Check the answers .SB Page 46 , 3b .Read the instructions and ask Ss to complete the task .Correct the answers .Step 3 While-task.SB Page 46 , Part 4 .1.Read the instructions and ask two students to read the dialogue .2.Make sure students understand what they need to do .3.Have students complete the work in groups of four after class .Step 4.Retelling.Get students to retell 3a according to the table in 3a.Step 5. Homework.Recite 3a.教学后记: 通过本课的学习，多数学生都能掌握现在完成进行时的用法及结构，能用此结构来说 一些句子，但是对于since与for 的用法不够明确，对于现在完成进行时与一般过去时的用法混淆，课文不能当堂复述，有待于进一步练习巩固。