六、指代不清
指代不清主要讲的是代词与被指代的人或物关系不清，或者先后所用的代词不一致。比如：Mary was friendly to my sister because she wanted her to be her bridesmaid.
读完上面这一句话，读者无法明确地判断两位姑娘中谁将结婚，谁将当伴娘。如果我们把易于引起误解的代词所指代的对象加以明确，意思就一目了然了。这个句子可改为：Mary was friendly to my sister because she wanted my sister to be her bridesmaid.

七、不间断句子
这个错误的出现受中文意识的影响很大。很多考生在写句子时，句子之间缺乏有效的连接成分。甚至，有的句子写的比较中式化。比如：There are many ways we get to know the outside world.
分析：这个句子包含了两层完整的意思：“there are many ways”以及“we get to know the outside world”。简单地把它们连在一起就不妥当了。
改为：There are many ways for us to learn about the outside world. 或：There are many ways through which we can become acquainted with the outside world.

八、措词毛病
学生在写作中没有养成良好的推敲，斟酌句子中所选用词的习惯。大部分考生随心所欲，拿来就用，所以作文中用词不当的错误随处可见。比如：The increasing use of chemical obstacles in agriculture also makes pollution.
分析：显然，考生把obstacles“障碍”，“障碍物”误作substance“物质”了。另外“the increasing use(不断增加的使用)”应改为“abusive use(滥用)”。
改为：The abusive use of chemical substances in agriculture also causes/leads to pollution.

九、累赘
写句子没有一个多余的词；写段落没有一个无必要的句子。能用单词的不用词组；能用词组的不用从句或句子。比如：In spite of the fact that he is lazy, I like him.
本句的“the fact that he is lazy”系同谓语从句，我们按照上述“能用词组的不用从句”可以改为：In spite of his laziness, I like him.
比如：For the people who are diligent and kind, money is just the thing to be used to buy the thing they need.
整个句子可以大大简化为：Diligent people use money only to buy what they need.

十、不连贯
不连贯是指一个句子前言不对后语，或是结构上不畅通，这也是考生常犯的毛病。比如：The fresh water, it is the most important things of the earth.
分析：the fresh water与逗号后的it不连贯，it与things在数方面不一致。

好，说完了。希望能帮到各大考生！