Remember that each clause takes only one sentence. If you have mentioned the subject of a sentence by name, there is no need to repeat with a pronoun.

　　记住，每个从句只需要一句话。如果之前你已经提到主语的名字，就不需要再用代词重复了。

　　Example 1:

　　例一：

　　Tom lives in Los Angeles.

　　汤姆住在洛杉矶。

　　NOT

　　而不是

　　Tom, he lives in Lost Angeles.

　　汤姆，他住在旧金山。

　　Example 2:

　　例二：

　　The students come from Vietnam.

　　学生们来自越南。

　　NOT

　　而不是

　　The students they come from Vietnam.

　　学生们他们来自越南。

　　Incorrect Tense

　　时态错误

　　Tense usage is a common mistake in student writing. Make sure that the tense used corresponds to the situation. In other words, if you are speaking about something that happened in the past do not use include a tense that refers to the present. For example:

　　时态错误在学生写作中很常见。你要确保时态与事情发生的情况一致。也就是说，如果你要表达的是发生在过去的事，就不要使用现在时态。例如：

　　They fly to visit their parents in Toronto last week.

　　上周他们坐飞机去看望父母。

　　Alex bought a new car and drives it to her home in Los Angeles.

　　亚历克斯买了一辆新车，并把它开进了洛杉矶的家。

　　Incorrect Verb Form

　　动词形式错误

　　Another common mistake is the use of an incorrect verb form when combining with another verb. Certain verbs in English take the infinitive and others take the gerund (ing form).

　　另一个常见的错误就是在与其他动词连用时，动词形式的错误。英语中的动词既有不定式形式，又有动名词形式。

　　It's important to learn these verb combinations. Also, when using the verb as a noun, use the gerund form of the verb.

　　学习这些动词的连用很重要。当动词作为名词使用时，就要使用动名词形式。

　　He hopes finding a new job. / Correct -> He hopes to find a new job.

　　他想找一个新工作。

　　Peter avoided to invest in the project. / Correct -> Peter avoided investing in the project.

　　皮特没有在这个项目上投资。

　　Parallel Verb Form

　　动词复数形式

　　A related issue is the use of parallel verb forms when using a list of verbs. If you are writing in the present continuous tense, use the 'ing' form in your list. If you are using the present perfect, use the past participle, etc.

　　在使用多个动词时，有一个问题就是动词复数形式的使用。如果你是在用现在进行时进行写作，就应该使用动词ing形式。如果你使用的是现在完成时，就应该使用过去分词形式。

　　She enjoys watching TV, play tennis, and cook. / Correct -> She enjoys watching TV, playing tennis, and cooking.

　　她喜欢看电视，打网球和烹饪。

　　I've lived in Italy, working in Germany and study in New York. / Correct -> I've lived in Italy, worked in Germany, and studied in New York.

　　我住在意大利，在德国工作，在纽约读书。

　　Use of Time Clauses

　　时间从句的使用

　　Time clauses are introduced by the time words 'when', 'before', 'after' and so on. When speaking about the present or future use the present simple tense in time clauses. If using a past tense, we usually use the past simple in a time clause.

　　时间从句由时间词语引导，例如when，before，after等等。当我们表达现在或将来的事时，可以使用一般现在时的时间从句。如果使用过去时态，通常会使用过去时的时间从句。

　　We'll visit you when we will come next week. / Correct -> We'll visit you when we come next week.

　　下周我们会来看你。

　　She cooked dinner after he was arriving. / Correct -> She cooked dinner after he arrived.

　　他到了之后，她才开始煮饭。

　　Subject - Verb Agreement

　　主谓一致

　　Another common mistake is to use incorrect subject - verb agreement. The most common of these mistakes is the missing 's' in the present simple tense. However, there are other types of mistakes. Always look for these mistakes in the helping verb.

　　另一个常见的错误就是主谓不一致。最常见的就是一般现在时中漏掉了-s。但是，还有其他类型的错误。这些错误常发生在助动词的使用上。

　　Tom play guitar in a band. / Correct -> Tom plays guitar in a band.

　　汤姆在乐队里是弹吉他的。

　　They was sleeping when she telephoned. / Correct -> They were sleeping when she telephoned.

　　他打电话过来时，他们都睡着了。

　　Pronoun Agreement

　　代词一致

　　Pronoun agreement mistakes take place when using a pronoun to replace a proper noun. Often this mistake is a mistake of use of a singular form rather than a plural or vice versa. However, pronoun agreement mistakes can occur in object or possessive pronouns, as well as in subject pronouns.

　　代词不一致发生在用代词来替代专有名词的情况下。通常是使用了单复数形式的错误使用。但是，代词不一致也会发生在宾语或物主代词，和主格代名词上。

　　Tom works at a company in Hamburg. He loves his job. / Correct -> Tom works at a company in Hamburg. He loves his job.

　　汤姆在汉堡一家公司工作。他热爱这份工作。

　　Andrea and Peter studied Russian at school. He thought they were very difficult.Correct -> Andrea and Peter studied Russian at school. They thought it was very difficult.

　　(正确)安德里亚和皮特在学校里学习了俄语。他们觉得俄语很难。

　　Missing Commas After Linking Language

　　连接语言后漏掉了逗号

　　When using an introductory phrase as linking language such as a conjunctive adverb or sequencing word, use a comma after the phrase to continue the sentence.

　　当我们使用介绍性短语，例如连接副词或表示顺序的词语，通常会在短语后面打上逗号来连接下文。