在托福阅读中，有很多的长难句会成为影响考生理解文章的障碍。本文和大家介绍托福阅读长难句中插入语修饰的部分。插入语是一种起到解释、说明或者是补充内容的词汇、短语或者是句子，排除这部分的内容之后，句子完全不受影响。接下来，前程百利小编就和大家分享托福阅读长难句之插入语修饰。
首先，插入语的概念
插入语属于独立成分的范畴，是指插在句子中的一个词、一个短语或者是一个句子。
例如：Frankly, he'd like to listen to music.(Frankly就是插入的一个词)
To tell you the truth, he doesn't quite agree with this idea.(To tell you the truth是插入的短语)
插入语有三种作用：1、插入语主要是对一句话的附加解释，说明或者是总结;
2、插入语表示说话者的态度和看法;
3、插入语起到强调的作用，为了引起对方的注意。
其次，插入语的特征
了解了什么是插入语，我们应该掌握以下插入语的特征，比如：位置、构成特点以及语法特点等。
例如：这堆沙土，充其量，有十辆卡车就运走了。(位于句中的插入语)
我家后面有一个很大的园子，据家里老人说，叫做百草园。(
Wonderful, we have won again
To be frank，I don't quite agree with you.
从以上的例子中我们可以发现，插入语主要有三个特征：
1、它的位置比较灵活，可以治愈句首、句中或者是句末。
2、一般用逗号或破折号将其与句子隔开。
3、通常与剧中其他部分没有直接的语法联系，将它删掉之后，句子结构仍然完整。
再次，插入语的类型
1)定语从句做插入语
Tom, who has been particularly interested in the means by which people attain mental health, seems to be looking for conclusive answers.
Who引导的定语从句做插入语，修饰主语Tom。
2)同位语做插入语
Yellow fever, the disease that killed 4000 people in 1793, has reappeared after nearly two decades in the western Hemisphere
the disease that killed 4000 people in 1793和Yellow fever是同位语关系。
3)状语做插入语
Heavily perfumed white flowers were favorite with collectors in the eighteenth century, when the fragrance was valued much more highly than it is today.
When引导的时间状语做插入语。
最后，插入语在长难句中的作用
例如：Wild life zoologist Hulmut 6uechner(1953), in reviewing the nature of biotic changes in Washington through recorded time, says {that “(since the early 1940s) , the state had more deer than at any other time in its history, the winter population fluctuating around 320,000 deer (mule and black-tailed deer).【which will yield about 65, 000 of either sex and any age annually for an indefinite period】“}
难句结构拆分：
主句部分:Wild life zoologist Hulmut Buechner(1953)says(that...
修饰部分：
插入语：in reviewing the nature of biotic changes In Washington
through recorded time.
宾语从句{that “(since the early 1940s) , the state had m ore deer than……
以上就是前程百利小编整理的关于长难句的概念、类型、特征以及在长难句中的作用的体现。考生在解决长难句问题的时候，一定要特别注意一下插入语的部分，不要忽视了一些内容。
