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el Step1. Prewriting First I’ll present a typical paragraph on the screen and analyze it, pointing out the structure of the paragraph. And then define the topic sentence. We all know that cigarette smoking is a dangerous habit because it causes health problems. Doctors say it can be a direct cause of cancer of the lungs and throat and can also contribute to cancer of other ans. In addition, it can bring about other health problems such as heart and lung diseases. It is clearly known as one of the chief causes of death in our society. The topic sentence(主題句 ): We all know that cigarette smoking is a dangerous habit, because it causes health problems. Supporting sentences(拓展句 ): 1) Doctors say it can be a direct cause of cancer of the lungs and throat and can also contribute to cancer of other ans. 2) In addition, it can bring about other health problems such as heart and lung diseases. The concluding sentence(結(jié)論句 ): It is clearly known as one of the chief causes of death in our society. 段落中的主題句( topic sentence)是全段的統(tǒng)領(lǐng),它說明段落的中心思想和作者寫作的目的。段落的其余句子必須與主題句密切相關(guān),共同闡明、證實(shí)主題句。因此,主題句具有概括性,支配段落中其他各句的走句。有時(shí),段落中沒有結(jié)論句。 Step2. Whilewriting ⑴ After making sure students know what a topic sentence is, what the structure of a paragraph is, I’ll let them in pairs identify the topic sentences in paragraphs on the students learning plan. Meanwhile, remind students that sometimes topic sentences lies at the end of a paragraph, or even in the middle of a paragraph. Exercise One: Read the following paragraphs and underline the topic sentence. 1)But no matter what it is called, all polyester has certain good points. It does not wrinkle easily. It dries quickly after it is washed. It holds its shape. It is strong and keeps its colors well. 2)Names usually have origins, especially for Indians. Indians with distinctive physical characteristics, might be given names such as Big Foot or Crooked Leg. If there had been a big storm on the day of a baby’s birth, the baby might have been named Thundercloud. Grey Eagle, RedDog, Big Bear, and Spotted Wolf are examples of Indian names after animals. 3) Electric products are closely connected with our lives. Electric alarm clocks and music pouring from our radio awaken us。 we brush our teeth with an electric toothbrush, and shave with an electric razor. We read today’s headlines from newspapers printed on huge electric presses, and we write a letter on our electric typewriter before leaving for work to operate a puter and word processor. 4) Suppose you’re playing a game. You make a silly mistake and lose. Do you bee angry? Or can you laugh at yourself and hope to do better next time? Suppose you are at a special dinner. You accidentally spill some food. Why keep worrying about how clumsy you look? Why not laugh it off and enjoy yourself anyway? If you can, it’s good sign you’ve really grown up. Exercise Two: Read the following paragraph carefully and select the best topic sentence from the four possible answers that follow the paragraph. 1)Topic sentence:_____________________________________ I love sunny days because they are ideal for outings. I remember the sunny weekend when two roommates and I had a marvelous time in the old Summer Palace. Under the blue sky, the trees are bathed in golden light. On rainy days, I enjoy the sound of raindrops beating on the windowpanes. I watch the rain washing the trees and grass clean, knowing they will glitter when it clears up and hoping a rainbow will follow. In winter, a heavy snowfall offers a different type of pleasure. Cold as it often is, I always go outdoors and leave my footprints in the thick snow while throwing snowballs and making snowmen with my fellow students. A. A person should learn to be happy in all weathers. B. One’s mood should not be affected by bad weather. C. People usually prefer fine weather to severe weather. D. I enjoy both sunny weather and rainy or snowy weather. 2) Topic sentence: ______________________________________ On a cloudy day the clouds hide the sun, but the sun is always there. The clouds of thoughts, worries and desires cover and hide our happiness. We have to get rid of them in order to experience it. Then the happiness that lies in the soul and is always there will give us warmth. Also, happiness does not depend on circumstances. Objects and events are not its causes. It is dependent only on one thing: the peace in our mind. This means that in order to experience happiness intentionally, we have to make our mind silent, calm and relaxed. This happiness I am talking about is constant and existing for ever. It is our nature。 only our thoughts stand in our way of experiencing it. Drive away the thoughts and you are happy. A. Happiness always gives us warmth. B. Happiness can be found everywhere. C. Happiness is not dependent on our mind. D. Happiness is inside us and is not far away. Exercise Three: Look at the sentences below. Put them into the right order to make a paragraph. Find the topic sentence first. 1)① Their painting were realistic, but the painters also wanted to show their feelings about the landscape. ② These artists painted with watercolors and inks, using soft brushes. ③ Chinese landscape painting was at its best over a thousand years ago, in the time of the Song landscape artists. ④ They were very successful in achieving both aims. Keys: ③ ② ① ④ 2)① Also, most English men will open a door for a woman or offer their seat to a woman, and so will most Americans. ② The Americans and the British not only speak the same language but also share a large number of social customs. ③ For example, in both America and England, people shake hands when they meet each other for the first time. ④ Promptness is important both in England and in America. ⑤ That