关于英语四级作文有哪些常用词汇和句型需要我们掌握呢?下面就让小编为大家详解一下吧。
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，即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。
I. has both advantages and disadvantages.……既有利又有弊。例如：
ously television has both advantages anddisadvantages.
ng in a city has both advantages and disadvantages.
pared with cars，bikes havetheir advantages and disadvantages.
举一反三：
ough computers bring people a lot of convenience，they have many disadvantages.
2.…has many example，…However，just as every coin has two sides，…has its disadvantages.(本例将利弊分开讲，转折过渡自然。just as every coin has two sides也很值得背诵。)
(s)an importantrole /part in… ……在……中扮演重要角色/起重要作用。例如：
uters play an important role in science andtechnology.
uters play a more and more important role in ourlife.
Computers play anincreasingly important role in our studies.
ation plays an important part in developing ourmind.
ction to alcohol and drugs play a role inhomelessness.
举一反三：
rtisement plays an informative role in our dailylife.
the past，lettersplayed a decisive role in long-distance now ，telephone，email，fax have taken their place.
the development of…，随着……的发展，例如：
the development of our economy，m any Chinese families can afford a car.
the development of our economy and society，pollution is more and more serious.
the rapid development of science and technology，people can get a college degree by takingonline-courses at home.
the current social and technological developments，employees with more knowledge and higher academicdegrees are needed.
举一反三：
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 ischanging.
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 acar.
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anincreasing number of， a growing number of，a significant number of，a greatnumber of等来表达。)
本结构看似固定，实则富于变化，只要记住with有“随着”的意思，相信大家可以根据实际的需要造出更多的句子。
我们已经看到，开门见山的开头使论文直切主题，直白明确地提出了论点。不过在讨论某些有争议性的问题时，就显得有欠缺，因为我们必须在文章的开头引出人们对要讨论的问题的不同看法，然后再表明自己的观点。下面就是专门针对争议性论文的一种句型。
it comes to...，somepeople think /believe that...，othersargue /claim that opposite /reverse is e isprobably
some truth in botharguments /statements，but...当说到……，有些人认为……，但另一些人则持相反的观点……。这两种观点可能都有点道理，但……。
本结构先用when it comes to ...引出话题，再用rs ...这个对立的结构引出了两种相反的观点，然后说There is some truth in both…表明严谨公正的态度，最后用but…很自然地引出了自己的论点。请看下面这个例子：
TV，a good thing or bad thing
When it comes to TV，some people believe that it is extremely
valuable，as it provides relaxation，entertainmentand education.
Others argue thatit is harmful for it begins to control our lives
and deprives peopleof time to do other activities. There’s probablysome truth in both we must realize that television itself is neithergood or is the uses to which it is put thatdetermines its value to society.
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 orderto save the world.
'd better take effective measures to prevent studentsfrom cheating in exams.
government decided to take strong measures againstdrug
abuse.
nt measures should be taken to prevent terroristsfrom
carrying outfurther attacks.
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