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教学重难点
重点：The difference between the past tense and the present- tense.
难点：Talk about the past and the present.
教学方法
本课运用情景教学法、视听法、听说法和任务教学法进行教学。
教具准备
多媒体教室、PPT课件、卡片等
教学过程
Step1 Greetings
T:Good morning,boys and girls.Nice to meet you.
（设计意图：通过师生间的相互问候，拉近师生距离，营造宽松的学习氛围。）
Step2 Lead in
T:Today I’m very happy.Because I have a time tunnel.Do you want to know what I look like before?
T:Wow,Twenty years ago,I was a student.And...?
Ss:You were...
T：But now,I am a teacher.And...?
Ss:You are...
（设计意图：通过虚拟场景时光隧道回到20年前，看到我小时候的样子并引导学生用之前所学的过去时句子描述我小时候的样子，然后再看到现实生活中我现在的样子并引导学生用现在时的句子描述，从而复习旧知）
Step3 Presentating and practising new contents
1.T:Before,I also had a teacher.He is Mr Li.He was my teacher.So twenty years ago,he was a teacher .(出示卡片：was a teacher)
（设计意图：通过之前对我过去和现在的描述后，再次回到虚拟场景介绍我的老师，从而引出新知）
2.Watch the video and answer these questions.
1)Which subject did Mr Li teach?
2)Now what does Mr Li do?
3)What is Mr Li doing?
（设计意图：通过看视频整体感知语言，带着任务了解Mr Li 的过去和现在，培养自学能力，体现学科性）
2.Listen and answer
1)Who was Mr Li's pupil?
2)What is Chen Hai's job now？
3)What is Chen Hai doing ?