1. 词汇失误
Example 1: Reading can increase my words, rich my knowledge and enlarge my eyesight.
这是考生在描述读书的好处，其优点在于在句子结构方面尽力打造排比结构。然而，词汇失误严重影响句子理解和整体效果。“读书可增大词汇量，增长知识，开阔眼界。”本句中词汇失误频繁出现，如：increase，words，rich ;enlarge my eyesight令人费解。建议可做如下修改：
Revised: Reading can enlarge my vocabulary, enrich my knowledge and broaden my horizons.
Example 2: Sometimes I play with friends from my school.
此句是典型的Chinglish，在中文中，可以说“和朋友玩”，但是不可对应为英文的“play with friends”，其意思是把朋友当成了玩具。play 用作不及物动词时，常接介词 with，表示“玩;玩耍”。例如：
The little boy is playing with a yoyo.
Don't play with fire. It is very dangerous.
2.句子层面的常见失误
考生在语法方面的错误主要表现为“主谓不一致、可数名词单复数错误、时态错误、限定动词和非限定动词错误”等，这里就不一一赘述了。此外，还有一些句子层面的常见问题值得我们关注，现列举如下：
①Run-on Sentences (串句)
串句是不用连词和标点而把两个(或以上)独立的句子串在一起的错误表达。有些串句是不用任何标点间隔两个甚至更多的句子;有些串句是在该用句号时滥用逗号，忽略了英语语言中的逗号本身没有连接句子的功能这一原则。
例如：
Rita decided to stop smoking she didn’t want to die of lung cancer.
The exam was postponed the class was canceled as well.
★修改原则
A.把原句分成两个独立的句子。
Rita decided to stop smoking. She didn’t want to die of lung cancer.
The exam was postponed. The class was canceled as well.
B.用并列连词连接两个句子。
Rita decided to stop smoking, for she didn’t want to die of lung cancer.
The exam was postponed, and the class was canceled as well.
C.用分号连接两个句子。
Rita decided to stop smoking; she didn’t want to die of lung cancer.
The exam was postponed; the class was canceled as well. Toefl
②Fragmentary sentences (破句)
破句是把不完整的句子当作独立的子句来写作时发生的错误。常见错误包括：从属连词引起的破句，ing分词和不定式结构引起的错误，增添细节引起的破句和缺少主语的破句。
例如：
After I arrived in Chicago by bus. I checked into a room. Then I went to a diner to get something to eat.