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在语境中运用过去进行时，并掌握其形式、意义和功能；
在语境中运用while和when引导时间状语从句，结合过去进行时来理解其在意义上的区别并掌握其用法；
正确使用过去进行时以及连词when和while完成交际任务；
在完成交际任务过程中提高英语学习的愿望和兴趣，积极参与英语实践活动。
在语言活动中发现语言规律并予以运用。
教学重点和难点
教学重点：过去进行时的结构与表意功能
教学难点：连词when和while在过去进行时中的使用。
教学过程：
Step1: Lead in
Ask the students if they still remember what happened on the day February 12th 2018. Then let the students watch a video.
Step 2: Present the target language (the past progressive tense)
While watching the video, ask the students:
What was the man doing when the earthquake happened?
What were they doing when the earthquake happened?
After watching the video, tell the students what the teacher was doing then. Add one more question:
What were you doing when the earthquake happened?
Get the students to focus on the target language by answering these questions. Write all the answers to the questions on the blackboard as the students answer. Get the students to pay attention to the structure of the sentences in the past progressive tense.
Sum up the form, meaning and use of the past progressive tense by filling the chart.
The structure of the tense
The name of the tense
The usage of the tense
Step 3: Drill practice (the past progressive tense)
Ask the students the question: “what were you and your partner doing when the earthquake happened?” Get them to ask and answer the question in pairs. Then fill in the following chart.
You
Your partner
Step 4: Present the target language (the use of while)
Get the students to compare the following two kinds of sentences to see which is better?
When the earthquake happened, I was having my hair cut while Jack was having dinner.
When the earthquake happened, I was having my hair cut. When the earthquake happened, Jack was having dinner.