在四级考试中，作文是重中之重，而作文的语言表达则是考核的重点。因此，熟练掌握一些常用的句型可以帮助我们更好地表达自己的思想，提高作文的得分率。
首段
开头万能公式：There is no denying that + 句子（不可否认的是……）
例句：There is no denying that the issue of environmental pollution has become a global concern.
中间段
1. 引出观点型
① As far as …is concerned 就……而言
例句：As far as the current situation is concerned, the lack of job opportunities is a pressing issue.
② It can be said with certainty that… 可以毫不怀疑地说……
例句：It can be said with certainty that the quality of our education system needs to be improved.
2. 表达递进型
① What is more, …… 此外，……
例句：What is more, air pollution not only affects our health but also causes damage to the environment.
② In addition, …… 此外，……
例句：In addition, the government should take measures to reduce the income gap between the rich and the poor.
3. 表示比较型
① Similarly, …… 同样地，……
例句：Similarly, the government should also invest more in education and healthcare.
② Likewise, …… 同样地，……
例句：Likewise, we should also pay attention to the development of renewable energy.
4. 表示因果型
① Because/Since we read the book, we have learned a lot. 因为我们读了这本书，我们学到了很多。
例句：Because of the traffic jam, I was late for the meeting.
② Thanks to + N/Ving ……由于……
例句：Thanks to the efforts of the medical staff, the patient recovered quickly.
5. 表示举例型
① For example, …… 例如，……
例句：For example, many people prefer to use public transportation rather than driving their own cars.
② Take …… for example, …… 以……为例，……
例句：Take the Internet for example, it has brought great convenience to our daily life.
结尾段
1. 给出建议型
① It is high time that we put an end to the (trend). 该是我们停止这一趋势的时候了。
例句：It is high time that we put an end to the air pollution.
② It is necessary that we (should) take some effective measures. 我们应该采取有效措施。
例句：It is necessary that we should take some effective measures to protect the environment.
2. 表示后果型
① Obviously, if we don’t control the problem, the chances are that …… 很明显，如果我们不能控制这一问题，很有可能会……
例句：Obviously, if we don’t control the problem of overfishing, the chances are that we will lose a lot of marine resources.
② No doubt, unless we take effective measures, it is very likely that …… 毫无疑问，除非我们采取有效措施，否则……
例句：No doubt, unless we take effective measures, it is very likely that the air pollution will become worse and worse.
四级作文中，句型的运用是非常重要的。我们可以通过多读英文文章，积累一些常用的句型，提高自己的写作水平。同时，我们也可以通过多练习，不断地总结经验，来提高自己的作文能力。