1、The children were running on the playground as fast as they can.

改：can-could

解释：主句是过去进行时，从句也应该是过去时，保持一致。

2、Since her husband had died, so she had to support her family.

改：把so去掉。

解释：since表示原因，不需要so再来表示结果。两个词不能同时用在一个句子中。

3、He won't go out until his mother will come.

改：will come-comes

解释：主句是一般将来时，until引导的时间状语从句用现在时表示将来，改为第三人称单数。

4、He was very foolish that he didn't pass such an easy exam.

改：very-so

解释：so...that，如此……以至于。

5、Tom had gone out as soon as his mother got home.

改：had gone-gone

解释：主句用一般过去时。

6、It was three months since he came to our school.

改：was-is

解释：从过去到现在的一段时间，用现在时。

7、The platground of our school is larger than their school.

改：加上 that of (their school)。

解释：操场要和操场作比较，不是跟学校比。用that来指代。

8、The streets in Nanjing are wider than Shanghai.

改：those in (Shanghai)。

解释：街道要和街道比较。用those来指代复数的名词。

①讲求实效

学习听说一定要把讲求实效放在第一位!充分运用时间，掌握必须的、急需的英语单词、语法、句型等。

②要从内心深处激发一种对英语的喜爱之情

我们要把学习英语当作是一个开心而愉快的美差，把英语变成自己生活的一部分，试着用英语去描述、表达日常生活中出现的事物，比如说看喜欢的英语电影和英语电视，听喜欢的英语歌曲，阅读喜欢的英语资料，用英语来做事：如写购物清单，写备注等。而这所有的一切也正是语言学习的真谛。

③将主要精力放在这些核心内容上

学习英语口语，一个最大的弊端就是“眉毛胡子一把抓”，贪多求全，这也是口语学习上的通病。If you fail to plan, you plan to fail. 要提高英语口语的学习效率，就必须明确在英语学习的每一个台阶应该学习什么内容，将主要精力放在这些核心内容上，才能做到有的放矢，事半功倍。

④模仿

是外语学习的主要方法之一，大声朗读是其中的关键，它能让你的口腔充分的锻炼。模仿要到了什么时候才算好了呢?简单的说就是要“像”，指的是语音语调都很接近被模仿者的语言。每天花15-30分钟的时间，养成大声朗读、模仿的习惯。

⑤练习

学习英语应该要付之行动，就像学习游泳一样，即使是世界冠军给你示范一万遍，如果你就是不肯下水，那你就永远是个旱鸭子。坦诚地说：语言对大部分来说，不是一门知识，而是一门技能，要想掌握好，最有效的途径就是像学艺一样地拳不离手，曲不离口。所以只要你使用的次数越多，你就能越多的体会到你开始慢慢地爱上这种神奇的语言。

There are still many problems of environmental protection in recent years. One of the most serious problems is the serious pollution of air, water and soil. the polluted air does great harm to people’s health. The polluted water causes diseases and death. What is more, vegetation had been greatly reduced with the rapid growth of modern cities. To protect the environment, governments of many countries have done a lot. Legislative steps have been introduced to control air pollution, to protect the forest and sea resources and to stop any environmental pollution. Therefore, governments are playing the most important role in the environmental protection today. In my opinion, to protect environment, the government must take even more concrete measures. First, it should let people fully realize the importance of environmental protection through education. Second, much more efforts should be made to put the population planning policy into practice, because more people means more people means more pollution. Finally, those who destroy the environment intentionally should be severely punished. We should let them know that destroying environment means destroying mankind themselves.

目前环保还存在着许多问题。最严重的问题就是空气、水和土壤的严重污染。污染的空气对人类的健康十分有害。污染的水引起疼病，造成死亡。更有甚者，随着现代社会的迅速扩建，植被大大的减少。 为了保护环境，各国政府做了大量的工作。采用了立法措施控制大气污染，保护森林资源和海洋资源，制止任何环境污染。因此，在当今的环保中政府起着最重要的作用。 我的看法是，为了保护环境，政府应当采取更具体的措施。首先，应当通过教育的方法使人们充分謒到环境保护的重要性。第二，应更加努力把计划生育政策付诸实施，因为人口多就意味着污染严重。最后，要严惩那些故意破坏环境者。使他们破坏环境就是毁灭人类自己。