6. 关联词语重复：Since I want to go to a good school, therefore I am trying to raise my test scores.不能在该句的主要主语和主要动词前使用连词。
7. 句子不完整：Many students have a hard time passing all the tests to getsintoscollege. For example, my friend in high school.句子没有主要主语或主要动词，因为其实它应是一个从句。这是一个非常常见的错误，修改的方法是将两个句子连接起来。
8. 不要使用：get When I got home, I got tired, so I got a book and gotsintosbed. Get太不正式，意思也过于含糊，不适合用在正式的场合。应将get改为一个更加具体的单词，如become, receive, find, achieve,等等。
9. 书写难以辨认信息不正确：I would like to study in America because all modern technology originated there.传的信息不正确，或者让人听起来觉得可能不正确(如果确实是正确的，应当解释为什么这样，因为读者不认为是正确的)。上述例句中，all的意思是百分之百;我们不能绝对地说每一件新东西都是从美国诞生的。为保险起见，应当使用many或most。非英语单词Computers are very helpful and advantageable.尽管看起来象个单词，其实不是，至少不是个英文单词。使用这个单词的另一种形式。
10. 介词多余：I would like to discuss about something important that you mentioned about to me during yesterday. We went to downtown yesterday to buy a watch. When I first came to the US, I did not have a lot of friends in here. In class, my classmate never mentioned about her husband.在表示这种意思时此单词不能与介词连用。这种情况常见于downtown，home，there，here等词。这些词语在英语中是副词而非名词，因而不能在它们前面添加介词。
11. 跑题或不相关：There are many reasons to buy a car, preferably a nice car.这个意思与okay for children to fail sometimes.所表达的意思很普通大多数人都已经知道到了，因而就没有必要再说出来。
