大學英語四級考試寫作部分的試題形式主要有：
1. 主題句作文
2. 提綱作文
3. 圖表作文
4. 看圖作文
5. 關鍵詞作文
6. 標題作文
7. 書信作文
下面就各個作文形式進行分析說明。
第一節 主題句作文
主題句作文是四級寫作中常見的一種作文形式。這是一種控制性作文，旨在控制考生的寫作范圍，要求考生根據試題中所給的主題句續寫一篇完整的短文。
在具體寫作時要以主題句為線索，因為它是全段的中心，所以具有很強的概括性。要合理安排有關材料或細節，將段落充分展開，并保證各段落在意義上連成一體，形式上互為統一，語氣上一氣呵成，否則就會偏離主題。
如：
Directions: For this part, you are allowed 30 minutes to write a composition about TV and Education in three paragraphs. You are given the topic sentence of each paragraph and are required to develop its ideas by completing the paragraph. You should write at least 120 words and remember to write clearly on the Answer Sheet.
TV and Education
1. TV is playing a more and more important part in education today.
2. But the problems with TV today are also growing more and more serious.
3. Some suggestions have been put forward in attempt to solve this problem.
我們在寫主題句作文時應按下列步驟進行寫作：
1. 仔細閱讀指令，明確寫作題目及其它要求。
2. 仔細推敲主題句。
主題句是段落的主導思想，是作者要加以說明，論證或描寫的中心。因此在做主題句作文時，一定要仔細推敲找出所要闡述、說明或論證的重點，然后圍繞主題句展開想象，進行論證、說明或描述。有些考生見到文章的主題句后，不善于分析，而是馬上動筆寫，結果寫出的文章語無倫次，不深不透。還有的考生則是看過第一段的主題句后便順勢寫下去，結果把三段的內容寫在一段里，這都是不可取的。
3. 找出支配全段的主導思想。
分析主題句要找出支配全段的主導思想。支配思想對全段起統帥作用，并決定全段的發展方向。如以上三段各主題句中的支配思想分別為“more and more important part”，“more and more serious”，和“solve this problem”。
4. 選材和擬定提綱。
準確、全面地理解了文章的主題后就可以根據主題句確定要寫的基本內容以及表現這一內容的材料，并擬定寫作提綱。選材時，要準備分別用二、三個事實對主題加以論述，說明或描述。
5. 段落寫作。
主題句只是提出了一段的寫作中心，要進一步表達思想，就要展開段落。考生在進行段落寫作時應注意段落的統一性和連貫性。段落的統一性(也說單一性)是指每段應只有一個中心思想，段落中所有的句子都圍繞中心思想進行發揮。段落的連貫性是指段落的每一個句子都應按一定的邏輯順序排列，句與句之間的過渡必須自然，轉換必須順勢，銜接必須緊湊。
參考范文：
TV and Education
TV is playing a more and more important part in education today. Millions of people in China are learning foreign languages through TV. Adults watch TV every day for a great variety of courses. Special English-learning programs are available on TV for preschool children. TV is now quite indispensable in education today.
But the problems with TV today are also growing more and more serious. For example, school children keep watching TV until late at night, leaving little time for school assignment. Watching TV for so many hours a day certainly spoils their eyesight, and makes them less enthusiastic in school studies. What is even worse, so many telefilms and teleplays are about love affairs that a great number of students begin to make friends of the opposite sex or fall in love at a much earlier age than before.
Some suggestions have been put forward in attempt to solve this problem. Parents ought to help children select appropriate TV programs and set up some time limitations. School teachers ought to tell students how to make correct use of TV programs. TV stations should be careful in the selection of movies and plays. Newspapers and
journals
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