在英语学习中，语法永远是一个让人头疼的内容。枯燥的语法让人昏昏欲睡，丝毫没有学习下去的动力。这次总结了众多同学写作中最容易犯错的几个语法问题，赶快来自我检测一下吧！

【错误一】有些副词是不可以直接连接句子的，比如however, therefore, otherwise, thus, hence. 

来看四个准确的句子：

1. He studied hard; therefore, he passed the exam.(使用分号+therefore）

2. He studied hard. Therefore, he passed the exam(这样是两个句子）

3. He studied hard, so he passed the exam.(so是连词)

4. He studied hard, and therefore, he passed the exam.(and 是连词)

   
   

【错误二】People like to think that being on a diet is healthy, however, there is considerable evidence to the contrary.

  错误原因:however是副词，不能连接两个句子。

  改正: People like to think that being on a diet is healthy; however, there is considerable evidence to the contrary.

【错误三】从属连词（because，although, that等），一定要连接两个句子才可以。

 eg.Because it is not serious. Many countries do not take any real countermeasure.(错误，becuase 引导的是一个从句，缺少一个主句)。

 eg.Some countries are not able to solve environmental problems. Although these countries have realized these problems. (错误，although 引导的是一个从句，缺少一个主句)

 【错误四】Many children have little knowledge of what their need and whether products meet theirs needs.

   错误原因：their 应该改为they, 充当从句的主语。theirs 应该改成their， 充当needs 的定语。

  【错误五】完整的句子一定要有谓语

   eg. Tourism has instead of agriculture as the main industry in many places.

  错误原因: instead of 是介词词组，不能做谓语动词。

  改正：Tourism has replaced agriculture as the main industry in many places. 

【错误六】应注意关系代词“which, that, who, whom” 后面的句子不完整（缺主语或宾语），而关系副词“where, when, why” 后面的句子必定完整。

 eg. People like shopping on the boxing day when can buy fashionable commodities at low cost.(错误) 

错误原因：关系副词when后句子要完整

改正：People like shopping on the boxing day， when they can buy fashionable commodities at low cost.