33、main idea sentence is called a topic sentence or topic statement. The topic sentence states briefly an idea whose full meaning and significance are developed by the supporting details. It may appear at the beginning, or in the middle, or at the end of a paragraph. The topic sentence is very importan 。

34、t to the paragraph and the whole text, if readers find it quickly, and then their reading speed will be improved.4.1 At the BeginningThe most frequent placement of a stated topic sentence is as paragraphs first sentence. And the main idea of each paragraph is most commonly expressed in the first sen 。

35、tence. Here is an example of a paragraph that begins with the main idea.Londons weather is very strange. It can rain several times a day: each time the rain may come suddenly after the sun is shining brightly. The air is damp and chill right through July2From this paragraph, readers can find the top 。

36、ic sentence is the first sentence quickly. In fact, the topic sentence of each paragraph is most commonly expressed in the first sentence, so they can find it easily.4.2 In the MiddleOccasionally readers will find the topic sentence in the middle of a paragraph. Often, with this placement, the write 。

37、r begins with a transition from the previous paragraph or with several details to catch the readers attention before stating the main idea. The topic sentence is then followed by additional details. Here is an example of this pattern:The average American preschooler watches more than twenty-seven ho 。

38、urs of television per week. This might not be bad if these young children understood what they were watching. But they dont. Up through ages three and four, most children are unable to distinguish fact from fantasy on TV, and remain unable to do so despite adult coaching. In the minds of young child 。

39、ren, television is a source of entirely factual information regarding how the world works. There are no limits to their credulity. To cite one example, an Indiana school board had to issue an advisory to young children that, no, there is no such thing as Teenage Mutant Ninja Turtles. Children had be 。

40、en crawling down storm drains looking for them. 3The paragraph begins with a startling statisticthe number of hours per week that preschoolers watch televisionand then moves to the even more distressing fact that these children do not know what they are watching. This idea, the paragraphs main idea, 。

41、 is then stated in a positive rather than negative structure: children believe that what they are watching factually recreates the real world. A specific example then follows to illustrate childrens inability to distinguish between fact and fiction on TV. So readers can find easily the topic sentenc 。

42、e is located in the middle of this paragraph, i.e.“In the minds of young childrenhow the world works”.4.3 At the EndAnother placement of the topic sentence is at the end of a paragraph. In this pattern, the topic sentence states what the details“add up to” or prove. An example of this pattern is sho 。

43、wn in the following paragraph.To meet their expenses, the mass media sell their product in two ways. Either they derive their income from selling a product directly to mass audiences, as do the movie, record and book industries, or the derive their income from advertisers who pay for the access to m 。

44、ass audiences that the media provide, as do newspapers, magazines, radio and television. In short, the mass media operate in a capitalistic environment, and, with few exceptions, they are in business to make money. 4Although the first sentence sounds like a generalization that could be a topic sente 。

45、nce, the last sentence is more general. Note also the signal words“in short” to announce the paragraphs summary statement: the media are in business to make money.4.4 At the Beginning and the EndIn some paragraphs the topic sentence appears both at the beginning and the end of the passage. The write 。

46、r repeats or, more accurately, restates the paragraphs main idea. Theres an example:Media-depicted violence scares far more people than it inspires to violence, and this, according to George Gerbner, a leading researcher on screen violence, leads some people to believe the world is more dangerous th 。

47、an it really is. Garbner calculates that 1 in 10 television characters are involved in violence in any given week. In real life, the chances are only about 1 in 100 per year. People who watch a lot of television, Gerbner found, see their own chances of being involved in violence nearer the distorted 。

48、 television level than their local crime statistics or even their own experience would suggest. It seems that television violence leads people to think they are in far greater real-life jeopardy than they really are.5From this paragraph, readers can find the topic sentence is the first sentence and。

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标题：浅谈如何提高英语的阅读速度|浅谈如何提高英语的阅读速度 毕业论文( 三 )