托?？谡Z抓住主題句確定段落主旨（實(shí)例解析）

一般來講，任何一個(gè)段落無論長(zhǎng)短都會(huì)涉及問題的一個(gè)方面，也就是說每個(gè)段落往往要圍繞一個(gè)主題展開。如東一句，西一句，文章的脈絡(luò)就不會(huì)清晰，讀者也就無從抓住重點(diǎn)。托?？谡Z段落無論長(zhǎng)短都會(huì)有說明主題的句子，我們稱它為主題句(Key Sentence / Topic Sentence)。抓住主題句就等于抓住了段落的中心。因而，準(zhǔn)確判斷并找出主題句相當(dāng)重要。主題句一般會(huì)出現(xiàn)在段首或段尾，起概括全段的作用。托?？谡Z主題句也可以出現(xiàn)在段中，同時(shí)還可以首尾呼應(yīng)，段落結(jié)束時(shí)再次強(qiáng)調(diào)本段落的中心思想。

例1：閱讀下面的段落：

Now let’s look at an interesting example with color. If you own a blue car, you know it isblue, even it is in bright sunlight, in darkness or under a yellow street light. Your eyes tell youthat it changes color in these different situations, but your brain knows better. You have learntthat cars don’t change color all time, and so your brain interprets the information your eyesgive you.

主題句在段尾：“你的大腦在解釋你的眼睛傳遞給它的信息。”前面有關(guān)藍(lán)色汽車的例子正是為說明這一觀點(diǎn)服務(wù)的。

主題句固然可以很好地向讀者說明段落的中心思想，但閱讀中我們常常會(huì)發(fā)現(xiàn)，有時(shí)很難在具體的位置找到一個(gè)明顯的能說明主題的句子。這時(shí)就需要我們對(duì)段落的整體內(nèi)容進(jìn)行歸納總結(jié)，高度概括提煉出它的中心思想。

注意到了托福 口語主題句的位置，抓住了主題句，就等于抓住了段落的中心思想。除此之外，閱讀時(shí)還應(yīng)注意一些進(jìn)一步歸納總結(jié)的詞匯和短語的使用以及其他一些措辭，因?yàn)檫@些詞的使用可以就什么是主題為讀者提供有用的線索。

例2：閱讀下面的段落：

Students today socialise in ways quite unlike those of their parents. One of the primarydifferences is the use and abuse of drugs. During the ‘60s and ‘70s, students were known tosmoke the odd joint and occasionally take harder substances, whereas according to recentpolls, students today are using ever larger quantities of drugs on an ever more regular basis.Whilst cannabis is still the drug of choice among young people, synthetic drugs such asecstasy and harder drugs such as cocaine and even heroine are being taken by an increasingnumber of students. Drugs are much more readily available to students and are much cheaperthan ever before.

段首句為主題句：“Students today socialize in ways quite unlike those of their parents.”它揭示了這段的中心思想是“現(xiàn)在的學(xué)生以一種不同于他們父母所采用的方式進(jìn)行著社會(huì)活動(dòng)?！庇嘞碌母鱾€(gè)句子都是以具體的事例來支持說明這一中心論點(diǎn)的。

例3：閱讀下面的段落：

We surveyed local residents in three university towns throughout the state to find out theiropinions on the students in those towns. We questioned over three thousand people andfound that since our last survey three years ago, attitudes towards students have changedconsiderably. “Lazy,” “scruffy” and “bad-mannered” was how more than 40% of thosequestioned described students, up from 22% in the last survey. This year only 25% consideredstudents to be “polite” and “friendly” compared with 39% three years ago. Overall, 49%considered students to be a positive part of the town compared to 58% last time.

這次調(diào)查發(fā)現(xiàn)，與三年前的一次調(diào)查相比，人們對(duì)于學(xué)生的態(tài)度產(chǎn)生了相當(dāng)大的變化。這是本段的主題。然后用具體的百分比數(shù)字說明這一中心觀點(diǎn)。主題句在段落中間。

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