托福聽力有許多種題型，事實(shí)上每一種題型都有它的出題規(guī)律與解題方法，那么不論是對(duì)話還是演講，首題都是主旨題，這篇文章主要討論如何去解主旨題。下面為大家?guī)砹送懈Ｂ犃Φ闹髦碱}怎么解答。

　　以下詳細(xì)介紹了托福聽力的主旨題怎么解答：

　　一、主旨題分類

　　主旨題可劃分成內(nèi)容主旨題和目的主旨題，內(nèi)容主旨題主要都是提出這篇文章主要內(nèi)容，主要話題。

　　出題方式：

　　What is the lecture mainly about?

　　What is the main topic of the lecture?

　　What does the professor mainly discuss?

　　目的主旨題主要是提出文章的主要意圖，講這篇文章的目的。目的主旨題的出題方式：

　　What is the purpose of the lecture?

　　Why does the student visit the professor?

　　Why does the professor discuss x?

　　二、主旨題信號(hào)詞

　　文章在給出主旨前，一般會(huì)有一些信號(hào)詞，信號(hào)詞后面的內(nèi)容便是主旨。來看一下這些信號(hào)詞。

　　And to get started I thought I’d mention something…

　　Today, I want to talk about…

　　Let’s continue our discussion about…

　　Before we close today, we need to discuss …

　　三、主旨題答案出處

　　托福聽力演講順序和問題都是根據(jù)順序的，主旨題的答案通常會(huì)在文章開頭出現(xiàn)。教授在演講開始時(shí)，都會(huì)表示今天主要講什么，這便是主旨。有一些教授一開始便會(huì)講今天要講的主要內(nèi)容;有的是以復(fù)習(xí)上節(jié)課內(nèi)容開始，引出今天的主旨;有的是教授先講一些其他的東西，再來講主旨。下面舉例來看一下。

　　1.文章一開始就出現(xiàn)主旨

Ok, let’s get started. Great. Today I want to talk about a way in which we are able to determine how old a piece of land, or some other geologic feature is - dating techniques. I’m going to talk about a particular dating technique. Why? Good dating is key to good analysis. In other words, if you want to know how a land formation was formed, the first thing you probably want to know is how old it is. It’s fundamental.

　　What does the professor mainly discuss?

　　A The differences in age among American mountain range

　　B The importance of a technique used for dating geological materials

　　C The recent discovery of an ancient canyon

　　D A comparison of minerals used for dating

　　上面的題教授在開始時(shí)便提到了主旨就是一個(gè)用來測(cè)定地理特征的年齡，而且測(cè)定地址年齡是很重要的。所以本題答案就是B。

　　2.先講相關(guān)內(nèi)容，引出這次課主旨

　　As geologists , we examine layers of sediment on the Earth' s surface to

　　APproximate the dates of past geologic time periods. Ah sediment as you

　　know is material like sand , gravel, fossil fragments that is transported by

　　natural processes like wind , water flow or the movement of glaciers.

　　So sediment is transported and then deposited and it forms layers on the

　　Earth’ s surface over time. We examine these layers to learn about

　　different geologic time periods including when they began and ended.

　　以上是托福聽力的主旨題怎么解答的介紹，主旨題一半都是第一題，只要考生在聽力開始，抓住這些信號(hào)詞，在平時(shí)學(xué)習(xí)時(shí)多加練習(xí)。