作为一种连接手段，定语从句可以让句子更加连贯。然而有些考生在使用定语从句时经常会出现一些错误，导致失分。下面小编就托福写作中定语从句的误用情况加以分析，大家一起来看一下吧。
1. 简单句堆砌
由于缺乏衔接意识，简单句之间缺乏连接成分。例如：My father is an engineer, he works very hard. He graduated from Zhejiang University. 我们用定语从句把上面的句子衔接如下：My father, an engineer who works very hard, graduated from Zhejiang University.
2. 信息杂乱堆积
考生按照中文意思堆积信息，忽略了衔接和句法。例如：I didn’t eat up all the food. It was ordered by my mother. It made her very angry. 我们用定语从句把上面的句子衔接如下：I didn’t eat up all the food that was ordered by my mother, which made her very angry.
3. 关系词误用
考生虽然有了句子衔接意识，但对关系词的性质理解错误，造成关系词的误用。例如：I come from Hangzhou, where is a beautiful city.
“where”是关系副词，不能充当名词性的主语，此处应使用名词性的关系代词，所以应该是：I come from Hangzhou, which is a beautiful city.
4. 先行词缺失
定语从句的关系词具有照应的功能，所以它所指称的对象不能缺失。例如：We should take some measures to punish who don’t obey the traffic rules. 根据句意，punish的对象应该是人，who应为定语从句的关系词，要照应前面指人的先行词，所以先行词不能缺失。上面的句子可修改为：We should take some measures to punish any person who doesn’t obey the traffic rules. 或者We should take some measures to punish whoever doesn’t obey the traffic rules.
5. 先行词多余
有些连接词本身具有名词性，内含先行词和关系词，再加先行词就显得多余。例如：I am very moved after listening to the words what Li Hua said.“what”相当于一个先行词加上前照应关系词，即“the words what”，不能再加先行词。这句话可以修改为：I am very moved after listening to what Li Hua said. 或者I am very moved after listening to the words (that) Li Hua said.
再如：在As it is known to us all, China is not what it used to be.这个句子中，关系代词as指代后面的整句话，且充当“is known”的主语，所以“it”是多余的。正确的句子是：As is known to us all, China is not what it used to be.
定语从句是一种重要的句子衔接手段，如果考生能够在托福写作中恰当地使用定语从句，将有助于增强语篇的连贯性，进而增强文章的可读性。因此，考生在学习定语从句时不应只停留在关系词的选择上，更应该从句子和语篇的角度出发，恰当地使用定语从句，避免出现语义上的错误。
以上就是托福写作中定语从句的误用分析，希望能给考生的学习带来帮助。最后，小编祝愿各位考生在托福考试中取得好成绩!
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