1.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。
2.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。
3.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。
4.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。
5.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。
6.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。
7.标点问题I love animals. And I like to help them. Because they are helpless. So I want to become a vet.这是一个非常普遍的问题!许多学生在句子中使用了太多的句号，尤其是当他们用手写的时候。
8.重复冗余Personally, I believe what the newspaper prints.一种意思的表述不止一次，或者某个词语不必要。
9.单数/复数Many year ago, dinosaur roamed the Earths.单词需要从单数变为复数，或者由复数变成单数。单数可数名词单数可数名词不能单独使用，应该将其变为复数形式或者加上限定词(a, the, my, his, her, Gary’s, no, any, 1, 3, 50, most,等等)。
10.代词指代不明If people do not speak the same language, it has a greater chance of miscommunication. I intend to complete my studies in the United States because they have good programs there.代词所指代的指示词(介词所代替的名词)不清楚。
11.过于笼统We should use our resources on Earth because the Earth is getting worse. 句子或它所表达的意思过于笼统，不能提供多少信息。
12.动词时态错误Yesterday I will go to the store because tomorrow I needed some food.动词时态不正确检查一下是应该用现在时、过去时、将来时还是完成时等等。
13.用词错误Even I don’t speak Spanish, I was able to find a bathroom in the department store. I gained a lot of pounds during vacation.用词错误或在此种情况下该词不是最佳用词。
以上是网为你整理的