Unit 4 Lesson 12 Healthy Bones（同步课件）-【上好课】 2024-2025学年八年级英语上册同步精品课堂（北师大版）

Lesson 12 Healthy Bones Unit 4 Healthy Living 北师大版八年级上册 The smallest bone in our body is in our head. A twenty-year-old man has more bones than a baby. Our bones stop growing when we are 21-25. Read the following sentences. Which one is false? Warm-up 单击此处编辑母版文本样式 第二级 第三级 第四级 第五级 2 Look at the pictures and skim the text. Choose the best title. A) Healthy Bones and Sick Bones B) Getting to Know Your Bones C) New Research on Our Blood Reading 单击此处编辑母版文本样式 第二级 第三级 第四级 第五级 3 Reading Divide the passage into two parts and summarize the main idea of each part. Part 1 (paragraph ) Part 2 (paragraph ) 1-2 3-5 Bones are important. What we can do to keep our bones healthy. 单击此处编辑母版文本样式 第二级 第三级 第四级 第五级 4 Read para. 3-5 and finish the table. What can help keep our bones healthy? Why are they important? How can we get them? Calcium Vitamin D make bones solid improve bone health keep calcium work well Doing exercise from milk, vegetables and other foods from the sun 单击此处编辑母版文本样式 第二级 第三级 第四级 第五级 5 Read the text again and answer the following questions. 1. Are bones weak? 2. Are bones hard on the inside? 3. What do bones make? 4. Why is blood important? 5. What can we do to keep our bones healthy? Now let’s read the text again and answer the following questions. First, let read the questions together. Number 1 Are bones weak? Number 2 Are bones hard on the inside? Number 3 What do bones make? Number 4 Why is blood important? Number 5 What can we do to keep our bones healthy? Are bones weak? No, they are strong. Check the answers. Every time we walk, sit down or hold a book, we are using our bones. Bones are important because they support our bodies and help us move freely. Although they are very light, bones are strong enough to support our weight. Okay, let’s check the answer. No. 1. Are bones weak? 翻页 we can find the answer in para 1. Look at the sentence here. 翻页 although they are very light, bones are strong enough to support our weight. From the sentence, we know that, bones are strong. They are not weak. So the answer is 翻页 no, they are strong. Bones are hard on the outside, but they are soft on the inside. The soft part of the bone makes our blood. Blood carries nutrients through our bodies. It also helps move waste materials away so our bodies can stay healthy. 2. Are bones hard on the inside? No, bones are soft on the inside. Let’ move to the second question. Are bones hard on the inside? Yes, we can find the answer in Para.2 翻页 Have you found this sentence in para 2? 翻页 bones are hard on the outside, but they are soft on the inside. So we know that bones are soft on the inside. They are not hard on the inside. So our answer is 翻页 no, bones are soft on the inside. 3. What do bones make? The soft part of the bone makes our blood. Bones are hard on the outside, but they are soft on the inside. The soft part of the bone makes our blood. Blood carries nutrients through our bodies. It also helps move waste materials away so our bodies can stay healthy. Now let’ look at the third question. What do bones make? Yes, the answer is also in Para. 2. 翻页 Look, 翻页 the soft part of the bone makes our blood. We can know that our bones can make our blood. So our answer is 翻页 the soft part of the bone makes our blood. 4. Why is blood important? Blood carries nutrients through our bodies and it also helps move waste materials away. Paragraph 2 … Blood carries nutrients through our bodies. It also helps move waste materials away so our bodies can stay healthy. What about question No. 4? Why is blood important? 翻页Let’s look at the sentences in para 2, 翻页 blood carries nutrients through our bodies. It also helps move waste material away so our bodies can stay healthy. From the sentences, we know that blood is very important. Why blood is important, because? Yes, 翻页 blood carries nutrients through our bodies and it also helps move waste material away. 5. What can we do to keep our bones healthy? We should get enough calcium and vitamin D, and we should exercise daily. Paragraph 3: Calcium makes our bones solid, … Paragraph 4: Vitamin D is also important … Paragraph 5: Exercise improves our bone health too, … Now let’ move to the last question. What can we do to keep our bones healthy? 翻页 Let’s look at the first sentences翻页 in para 3, para 4 and para 5. Calcium makes our bones solid, so we need to get enough of it each day. Vitamin D is also important because it helps calcium work well in our bodies. Exercise improves our bone health too, so make it a habit. Please pay attention to the words underlined.翻页 From the first two sentences, we know that calcium and vitamin are good for our bones. so we need to get enough calcium and vitamin D. and let’s look at the sentence in para 5, we know that doing exercise can help our bones heathy. so we should exercise daily. Now, do you know the answer? Yes! 翻页，we should…. Bones STEP 3 Draw a mind map and retell the passage What Why How light but strong hard… but soft… support… help… makes …. Calcium from… Vitamin D from… Exercise After-reading 12 Can you find some opposites? outside inside but soft hard soft-hard inside-outside 单击此处编辑母版文本样式 第二级 第三级 第四级 第五级 13 Can you find more opposites? Word Builder Adjective Opposite hard soft inside outside sick weak healthy strong 单击此处编辑母版文本样式 第二级 第三级 第四级 第五级 14 Look at the Sentence Builder. although 尽管，虽然 原因状语从句 结果状语从句 让步状语从句 Now let’s move on to the sentence builder. Let’s read the sentences first. 带读句子 Now let’s look at the words underlined. 翻页 他们都属于连词。 because 表示因为，so表示所以，翻页 所以第一组句子为原因状语从句和结果状语从句。 although意为尽管，虽然，翻页 but意为但是，所以第二组句子和第三组句子为让步状语从句。翻页 Now, let’s study these three pairs of sentences one by one. e.g. He went to the doctor. He was sick. He went to the doctor because he was sick. He was sick, so he went to the doctor. 1. Bones are important because they help us move freely. Bones help us move freely, so they are important. Look at the Sentence Builder. Let’s read the first two sentences. Bones are important because they help us move freely. Bones help us move freely, so they are important. Do these sentences have the same meaning? Yes What are the differences between the sentences? 第一个句子是用because连接前后两个部分，翻页 第一个部分是bones are important，表示结果，第二部分是they help us move freely, 表示原因，所以我们知道because后面接原因。 第二个句子是用so连接前后两个部分，翻页 第一个部分是bones help us move freely, 第二部分是they are important,表示结果，所以so后面接表示结果的部分。 同学们是不是还注意到so前面有逗号，翻页 而because前面没有标点符号，这就是这两个句子第二个不同点。 此外，老师还要强调一点，because和so不能出现在同一个句子中。同学们都记清楚了吗？ Now can you make sentences with because or so like these? For example 翻页 He went to the doctor. He was sick. How can we join these two sentences with because or so. 翻页 we can say he went to the doctor because he was sick. or he was sick, so he went the doctor. 2. Although we get vitamin D from food like fish and eggs, we can also get it from the sun! We get vitamin D from food like fish and eggs but we can also get it from the sun! Now let’s look at the second pair of sentences. Although we get vitamin D from food like fish and eggs, we can also get it from the sun! We get vitamin D from food like fish and eggs but we can also get it from the sun! Do these sentences have the same meaning? Yes What are the differences between the sentences? 第一个句子的连词是although，翻页 并且位于句首。 第二个句子的连词是but，翻页 位于句中。 当我们用but连接两个分句时，前后两个句子要用逗号隔开。 当我们用although连接两个分句，且although位于句首时，前后两个分句也要用逗号隔开，但是当although位于句中时，前后两个分句不用逗号隔开。 此外，还需要强调一点，although 和but不能在同一个句子中出现。 e.g. I don’t exercise. I’m never sick. I don’t exercise, but I’m never sick. Although I don’t exercise, I’m never sick. I’m never sick although I don’t exercise. Now let’s look an example and try to join these two sentences with although or but. The first sentence is I don’t exercise. The second sentence is I’m never sick. How can we join them? we can say like these. 翻页 I don’t exercise, but I’m never sick. Although I don’t exercise, I’m never sick. I’m never sick although I don’t exercise. Bones are hard on the outside, but they’re soft on the inside. Although bones are hard on the outside, they are soft on the inside. Now, let’s read the last pair sentences. Bones are hard on the outside, but they’re soft on the inside. Although bones are hard on the outside, they are soft on the inside. 同学们注意划线单词，翻页 翻页 以及这两个单词的意思和句中位置，回顾一下我们在第二组句子讲解中提到的语法点。 Free talk Write your own healthy advice and share with your partner Include the words because, so, although and but. Think about these things: Food, drink, exercise, sleep, school, bones Example: Don’t eat before you go to bed so you can sleep better. Although I’m very busy at school, I try to exercise three times a week. Speaking $$