論文主體段寫作技巧

　　在應(yīng)試型（雅思或新托福等）議論文寫作中，通常遵循introduction- body-conclusion（引言段-主體段-結(jié)論段）的三步曲。Body（主體）段落提供了論證觀點(diǎn)的理由，是整個(gè)文章的主體，在評(píng)分中占有很大的比重。例如一篇滿分的雅思作文（9分）必須presents a fully developed position in answer to the question with relevant, fully extended and well supported ideas。這里的fully extended / well supported，必須通過主體段來體現(xiàn)。新托福的滿分作文（5分）也要求is well organized and well developed, using clearly appropriate explanations, exemplifications, and/or details，同樣必須通過主體段落發(fā)展來實(shí)現(xiàn)。

　　一般來說，一篇議論文必須包含至少兩個(gè)主體段。每個(gè)主體段都必須有明確的主題句topic sentence和若干支持句supporting sentences。他們共同組成文章的理由段，對(duì)全文的論點(diǎn)提供理由支持。建議初學(xué)者在練習(xí)議論文寫作時(shí)，必須遵循理由段發(fā)展的幾個(gè)簡(jiǎn)單原則，這對(duì)迅速完成理由段、構(gòu)建連貫和理由充分的議論文大有幫助。這幾個(gè)簡(jiǎn)單原則包括：

　　1. Write a topic sentence for each paragraph you plan to write. Each topic sentence should relate to your thesis statement and introduce what the paragraph will be about. If you find that the topics you want to discuss do not support the thesis statement you have written, revise your thesis statement or reconsider your topic sentences.

　�。�每個(gè)主體段都必須有一個(gè)明確的主題句）

　　2. Write ideas that support your topic sentences. The topic sentence for each paragraph tells the reader what the paragraph will be about. The ideas stated in the rest of the paragraph should all relate to the topic sentence.

　　（支持句必須圍繞主題句展開）

　　根據(jù)第2條的原則，我們來看看下面這個(gè)主體段：

　　Hobbies are important for many reasons. First, a hobby can be educational. For example, if the hobby is stamp collecting, the person can learn about the countries of the world and even some of their history. Second, engaging in a hobby can lead to meeting other people with the same interests. A person can also meet other people by going to the school. Third, a persons free time is being used in a positive way. The person has no time to be bored or get into mischief while engaged in the hobby. Finally, some hobbies can lead to a future job. A person who enjoys a hobby-related job is more satisfied with life.

　　這段話的topic sentence很明顯-Hobbies are important for many reasons，之后的支持句從三方面闡述hobby的重要性（first, second, third），但段中這句話A person can also meet other people by going the school與hobby重要的原因沒有關(guān)系，因此削弱了整個(gè)段落的連貫性與統(tǒng)一性，應(yīng)該被去掉。

　　3. Add details. To write a more fully developed paragraph, you need to add details to your supporting ideas. Your details can be facts, examples, personal experiences, or descriptions.

　　（需要用多種方式提供細(xì)節(jié)展開段落）

　　根據(jù)第3條的原則，我們來看下面這個(gè)段落：

　　The Smithsonian Institution is worth visiting for a number of reasons. The Smithsonian Institution comprises various museums that offer something for everyone. These museums include the National Museum of History and Technology, the National Aeronautics and Space Museum, the National Collection of Fine Arts, the National Museum of Natural History, and several others. A person can do more than just look at the exhibits. For example, in the insect zoo at the National Museum of Natural History, anyone who so desires can handle some of the exhibits. The museums provide unforgettable experiences. In climbing through the Skylab exhibit at the National Aeronautics and Space Museum, I was able to imagine what it would be like to be an astronaut in space. Movies shown at regular intervals aid in building an appreciation of our world. In the National Aeronautics and Space Museum, there is a theater that has a large screen. When the movie is shown, it gives the viewer the feeling that he or she is in the movie itself, either floating above the Earth in a hot-air balloon or hang gliding over cliffs.

　　這是一個(gè)成功的主題段，請(qǐng)注意這段話段落細(xì)節(jié)展開的幾種形式-提供事實(shí)、舉例、個(gè)人經(jīng)歷和描述。我們把這個(gè)段落拆分后進(jìn)行分析：

　　Topic sentence（主題句）

　　The Smithsonian Institution is worth visiting for a number of reasons.

　　Supporting idea 1（支持理由1）

　　The Smithsonian Institution comprises various museums that offer something for everyone.

　　Details  facts（細(xì)節(jié)展開-提供事實(shí)）

　　These museums include the National Museum of History and Technology, the National Aeronautics and Space Museum, the National Collection of Fine Arts, the National Museum of Natural History, and several others.

　　Supporting idea 2（支持理由2）

　　A person can do more than just look at the exhibits.

　　Details  examples（細(xì)節(jié)展開-舉例）

　　For example, in the insect zoo at the National Museum of Natural History, anyone who so desires can handle some of the exhibits.

　　Supporting idea 3（支持理由3）

　　The museums provide unforgettable experiences.

　　Details  personal experience（細(xì)節(jié)展開-個(gè)人經(jīng)歷）

　　In climbing through the Skylab exhibit at the National Aeronautics and Space Museum, I was able to imagine what it would be like to be an astronaut in space.

　　Supporting idea 4（支持理由4）

　　Movies shown at regular intervals aid in building an appreciation of our world.

　　Details  description（細(xì)節(jié)展開-描述）

　　In the National Aeronautics and Space Museum, there is a theater that has a large screen. When the movie is shown, it gives the viewer the feeling that he or she is in the movie itself, either floating above the Earth in a hot-air balloon or hang gliding over cliffs.

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