八年级英语学科教案备课时间投放时间总课时教学内容Unit 8 grammar2授课人教学目标1.To develop a better understanding of the use of past continuous tense2.To understand the use of when and while 教学重点To use past continuous tense correctly教学难点The usage of when and while 突破重难点主要策略Group work, pair work课前准备Powerpoint, pictures, etc.Step1 Lead in Ask the students what we learned yesterday to review the structure of past continuous tense.STEP 2 Finding sentencesRead the passage below; find how many sentences are written in this tense.There was a robbery at 151 River Street yesterday afternoon. Someone broke into every flat in the building when all were out. The man in Flat 1 wasnt home. He was washing his clothes at the laundry ( 洗衣店 ). The woman in Flat 2 wasnt home either. She was visiting a friend in the hospital. The people in Flat 3 were gone. They were having a picnic at the beach. The man in Flat 4 was out. He was playing tennis in the park. The college students in Flat 5 were away. They were watching a football game. And the elderly lady in Flat 6 was out of town. She was visiting her grandchild. Yesterday certainly was an unfortunate day for the people at 151 River Street. They had no idea that while they were away, robbers broke into every apartment in the building.STEP 3 Eliciting the structures with when or whileRaise some questions about this passage to elicit the structures with when or while. What was the man in Flat doing when the robbery happened? While the college students in Flat 5 were watching a football game, what was the woman in Flat 2 doing?When sb.+ did sth., sb. was/were doing sth.While sb.+ was/were doing sth., sb. was/were doing sth.While/ when sb. was/were doing something. Sb. did sth. Write the structure on the board. It is still difficult for the students to understand the structure. So it is important to give them more examples to help them understand it. Get them to read the sentences in Part B, Page 98. STEP 4 Explaining when we should use while or whenGive more examples and then explain when we should use while or when.Emily was doing her homework while Steven was doing his project.两个长动作同时进行The light went out while Emily and Steven were working.一个短动作（主句）在一个长动作（从句）的过程中发生。When the phone rang, I was reading in my room.短动作（从句）发生时，一个长动作（主句）当时正在进行。We can also use the following diagrams to help. While my mother was cooking, my father was helping her. (强调同时)While / When my mother was cooking, my father came in. （强调短动作发生了）When my father came in, my mother was cooking. （强调长动作正在发生）STEP 5 Completing the exercises on Page 98Get the students to complete the exercises on Page 98. Check the answers. STEP 6 Doing some consolidate exercises A. Fill in the blanks with the proper forms of the given verbs. 1.- What _ you _ ( do ) when I knocked at the door ?- I _ ( wash ) the clothes.2. When he _ (draw) a picture, the telephone rang. 3. Jim _ (draw) a picture in his room at 4 yesterday afternoon.4. One day, he _ (lie) on the grass and _ (look ) at the beautiful sky when he fell asleep and had a very strange dream.5. We _ (clap) our hands while the performers _ (march) across the park.6. When Simon arrived, Amy _ (read) a book.B. Translate the following sentences into English, using past continuous tense. 1.我妈妈正做饭时，我爸爸在看报纸。While my mother was cooking, my father was reading newspapers. 2.当老师进教室的时候，学生们很吵闹。When the teacher came in the classroom, the students were making a great noise. 3.当孩子们正上课时，地震发生了。 While/ When the children were having lessons, the earthquake started. 4.当我在购物时，我突然听到一声像打雷一样的巨响。When/While I was doing some shopping, I suddenly heard a loud noise like thunder. STEP 7 HomeworkMake summaries about the grammar items in your own ways.Finish off the exercises教学反思：