老师：同学们大家好，欢迎来到北京市中小学空中课堂。我是来自于北京市朝阳外国语学校的韩方老师。今天我们将继续学习外研版初中英语八年级上册。
学生：modueight unit three。 As the name of the unit tells us, we are going to review and use the language a lot in today's lesson. Let's get our lesson started. Do you remember what happened in Unit 1 and Unit 2? Maybe the pictures can help you a little bit. From the first picture, we know someone had a car accident. And from the second picture, we know in Unit 2, Henry was beaten by a snake, and he was taking a photo of the snake.
学生：To refresh our memories more, let's look at the conversation between the doctor and Henry. In the word bank, we have 4 verbs appear, byte, show, throw. So let's get familiar with the conversation first. When did the snake you earlier in the morning. It suddenly in front of me and beat my hand. Can you me a photo of it? Yes, here it is. Oh, the snake was on the table. Yes, I ate on the table after it beat me from earlier in the morning. We can conclude this is something happened in the past. So, do you have your answers already? Let's check answers together.
学生：When did the snake bite you? Earlier in the morning. It suddenly appeared in front of me and beat my hand. Can you show me a photo of it? Yes, here it is. Oh, the snake was on the table. Yes, I threw it on the table after it beat me.
学生：Next, let's look at a similar car accident from the World Bank. We have four expressions, fall off just in time, pay attention, side by side. Let's get familiar with the passage first. When the girl was riding her bike with a friend, she had an accident. They were talking and they were not. A car came round the corner but stopped. The car didn't hit her, but she her back. Let's check answers. When the girl was riding her bike side by side with a friend, she had an accident. They were talking and they were not paying attention. A car came round the corner but stopped just in time. The car didn't hit her, but she fell off her bike.
学生：Maybe you have noticed some sentences from the conversation or the passage. Let's look at these sentences together. Let's read it out. 1 when Henry was trying to find the snake, his hand began to hurt badly. 2 I was trying to pick it up when it beat me again. 3 while the lights were changing to red, a car suddenly appeared round the corner. 4 while Tony was playing in the park, I was visiting my grandparents. So these four sentences are in the past, continuous tense. Next, let's focus on when, when Henry was trying to find the snake, his hand began to hurt badly. Look at what. trying was trying。
老师：是一个延续性动词，表示在一个时间段内的发生。
学生：i was trying to pick it up when it beat me again here。
老师：beat 是一个终止性的动词，表示它只能发生在一个时间点上。
学生：next lets look at while while the lights were changing to red a car suddenly appeared round the corner we
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