一、开头句型
我们常说，良好的开端等于成功的一半。做事如此，作文也是如此。所以我们颇有必要在作文的开头花一番心思。
在写议论文时，你通常以什么样的.方式开头呢?最简单也最常用的可能就是开门见山法。也就是说———直截了当地提出你对这个问题的观点，点出文章的中心思想。
both advantages and disadvantages.……既有利又有弊。例如：
ously television has both advantages and disadvantages.
ng in a city has both advantages and disadvantages.
pared with cars，bikes have their advantages and disadvantages.
例如：
the rapid increase of China's population，housing problem is becoming more and more serious.
随着中国人口的急剧增加，住房问题越来越突出。
more and more women entering society，people's attitude towards women is changing.
随着越来越多的妇女走入社会，人们对妇女的态度也在改变。
the deepening of Chinese reform and opening up，an increasing number of Chinese families can afford a car.
随着中国改革开放的深入，越来越多的中国家庭买得起车了。(“越来越多”除了常用的more and more外，还可以用an increasing number of， a growing number of，a significant number of，a great number of等来表达。)
二、结尾句型
英语议论文多以简要总结全文或对所讨论的问题提出解决办法来结尾。总结全文时除常用到in one /a word，generally speaking等外，没有固定模式。提出解决办法时却常使用下一句型。
measures to do sth.例如：
should take measures to control pollution in order to save the world.
'd better take effective measures to prevent students from cheating on exams.
government decided to take strong measures against drug abuse.
nt measures should be taken to prevent terrorists from carrying out further attacks.