英语作文介绍活动的常用句子【一】
1、根据句子意思，选择恰当的双重否定词；
2、替换或删去原句中“要、得(děi、都、应该、只好、一定、必须、肯定”等词语；
3、删去原句中“很、非常、十分、分外、更加”等表示程度深的词语；
4、检查改后的句子是否读得通顺。
双重否定词及分类：
1、不得不、不能不、不会不、不是不、不敢不；
2、无不、无非、没有不、不是没有、不可能不；
3、不??不??、没有??不??、非??不可。
双重否定句
双重否定句是使用两个否定副词来表达肯定含义的句子。例如"不??不"、"没有??不"、"非??不"等。
双重否定句的肯定语气比一般肯定句强烈或委婉。例如：
他不敢不去。（强烈）
我不得不告诉你事情的原委。（强烈）
没有谁不惧怕他的威严。（强烈）
你若是想在这个世界留下值得让人怀念的事迹，那就非得有毅力不可。（强烈）他不会不同情我的`。（委婉）
没有什么不可以。（委婉）
书面语中还经常使用"无不、无非、不无、未必不"等双重否定词语来表示肯定。例如：他的话不无道理。
在场的观众无不为他的精彩表演所打动。
他无非是想多捞点退休金罢了。
我虽然年轻，但未必不是你的对手。
双重否定句也就是一种语义大于肯定句的语句
我对老师们的勇敢，从心底里感到无限的敬佩．（改为双重否定句）
可以改为
1我不能不对老师们的勇敢，从心底里感到无限的敬佩。
2我对老师们的勇敢，不能不从心底里感到无限的敬佩。
练习
1、我们得保证那东西完好无损。
2、这次活动的经过你应该很清楚。
3、每一个孩子都应该爱自己的母亲。
4、飞向遥远的地方，要和爸爸妈妈商量商量。
5、楚王只好吩咐手下打开城门，迎接晏子。
6、爹妈都不在家，我只好自己动手丰衣足食了。
7、为了回家，凡卡只好给爷爷写信，诉说学徒生活的痛苦。
8、写得不怎么样，但还是有希望的。
9、我一定要为中国人争气。
10、这本书太有价值了,你一定要看。
11、这个问题必须讲清楚。
12、红四团的战士必须抢在敌人前面赶到泸定桥。
13、学校里只给每人发一张票,这真叫人为难。
14、燕子飞过大海，肯定非常辛苦、艰难。
15、他这样做虽然过分了点，但还是有道理的。
16、香港回归伟大的祖国，我们感到无比自豪。
17、您为我们付出了这样高的代价，足以表达您对中国人民的友谊。
18、每个小孩子都喜欢小动物。
19、我对同学们的勇敢精神，从心底里感到无限的敬佩。
20、信赖，往往创造出美好的世界。
21、这是伟大的奇观。
22、你应该知道这件事。
23、我们建成了希望小学。
24、詹天佑是我国杰出的爱国工程师。
25、星期天,我们必须去看排球赛。
26、报纸的诱惑力如此之大，每日都要读它。
27、他这样做虽然过分了点，但还是有道理的。
28、问题还没有弄清，但已经有了一点儿头绪。
29、写得不怎么样，但还是有希望的。
英语作文介绍活动的常用句子【二】
也叫下定义。有时为了突出事物的主要内容和主要问题，往往用简明扼要的话给事物下定义，使读者对被说明对象有个明确的概念。例如《统筹方法》一文中，作者运用了下定义的说明方法，给统筹方法下定义：“统筹方法，是一种安排工作进程的数学方法。”语言简明、扼要、准确。英语作文介绍活动的常用句子【三】
也叫打比方。用人们熟知的事物做比喻，可使要说明的事物具体、形象，有助于人们了解被说明事物的特征。比如《中国石拱桥》一文的开头写道：“石拱桥的桥墩成弧形，就像虹。”这个比喻一下子就抓住了石拱桥的特征。英语作文介绍活动的常用句子【四】
1。 It is considered /thought that人们（有人，大家）认为
2。 It is generally /usually accepted /agreed/recognized that普遍（一般，通常）认为
3。 It is believed that有人（人们，大家）相信
4。 It is well—known that大家知道（众所周知）
5。 It is said that据说（有人说）
6。 It is learned that据闻（悉）
7。 It is supposed that据推测
8。 It is estimated/predicted/calculated that据估计（预计）
9。 It must be pointed that必须指出
10。 It is reported that据报道
11。 It must be admitted that必须承认
12。 It will be seen that可见（可以看出）
13。 It will be seen from this that由此可见
14。 It is understood that不用说（都知道）
15。 It can not be denied that无可否认
16。 It has been proved/demonstrated that已经证明
17。 It may be confirmed that可以肯定
18。 It may be safely said that可以有把握地说
19。 It is sometimes asked that人们有时会问
20。 It is expected that/hoped that人们希望
21。 When it comes to要说到，要谈及
英语作文介绍活动的常用句子【五】
也叫列数字。有时为了便于从数量上说明事物的特征，往往用一些数字来准确地、科学地加以说明。例如《海不》一文中说明海的长、宽、深的.文字。《雄伟的人民大会堂》一文中，也用一系列数字来说明庄严的人民大会堂是首都最宏伟的建筑之一。英语作文介绍活动的常用句子【六】
1） Many nations have been faced with the problem of ……
2） Recently the problem has been brought into focus.
3） Recently the phenomenon has become a heated topic.
4） Recently the issue has aroused great concern among ……
5） Nowadays there is a growing concern over ……
6） Never in our history has the idea that …… been so popular.
7） Faced with ……, quite a few people argue that ……
8） According to a recent survey, ……
9） With the rapid development of ……,
10 When it comes to…, (当说到…
二、列举观点
I.Some people think/believe that…,
Other argue/claim that the opposite/reverse is true
1．Obviously television has both advantages and disadvantages．
2．Living in a city has both advantages and disadvantages．
3．Compared with cars，bikes have their advantages and disadvantages． ，
4．Although computers bring people a lot of convenience，they have many disadvantages．
5．．．．has many advantages．For example，…
6. However，just as every coin has two sides，…has it’s disadvantages．
II…play(san important role／part in……
1．Computers play an important role in science and technology．
2．Computers play a more and more important role in our life．
3．Computers play an increasingly important role in our studies．
4．Education plays an important part in developing our mind．
5．Addiction to alcohol and drugs plays a role in homelessness．
6．Advertisement plays an informative role in our daily life．
7．In the past，letters played a decisive role in long-distance communication．But now，telephone，email，and fax have taken their place．
III．With the development of…
1．With the development of our economy，many Chinese families can afford a car.
2．With the development of our economy and society，pollution is more and more serious．
3．With the rapid development of Science and technology，people can get a college degree by taking online-courses at home．
4．With the current social and technological developments，employees with more knowledge and higher academic degrees are needed.
5．With the rapid increase of China's population，housing problem is becoming more and more serious．
6．With more and more women entering the society，people's attitude towards women is changing．
7．With the deepening of Chinese reform and opening up, an increasing number of (a growing number of，a significant number of
families can afford a car．
三、陈述自己观点
There is probably some truth in both arguments／statements，but…
四、批驳
1）It is true that ……, but one vital point is being left out.
2） There is a grain of truth in these statements, but they ignore a more important fact.
3） Some people say ……, but it does not hold water.
4） Many of us have been under the illusion that……
5） A close examination would reveal how ridiculous the statement is.
6） It makes no sense to argue for ……
7） Too much stress placed on …… may lead to ……
8） Such a statement mainly rests on the assumption that ……
9） Contrary to what is widely accepted, I maintain that ……
10） No one can deny the fact that ……
11） The idea is hardly supported by facts.
12） Unfortunately, none of the available data shows ……
13） Recent studies indicate that ……
14） There is sufficient evidence to show that ……
15） According to statistics proved by ……, it can be seen that ……
五、结尾句型 ：
英语议论文多以简要总结全文或对所讨沦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，to conclude等外，没有固定模式。提出解决办法时却常使用下一句型：
1） From what has been discussed above, we can draw the conclusion that ……
2） It is high time that strict measures were taken to stop ……
3）. We should take measures to control the rapidly increasing world population．
4）. We’d better take effective measures to prevent students from cheating on exams．
5）. The government decided to take strong measures against drug abuse．
6）. Urgent measures should be taken to prevent terrorists from carrying out further attacks．
7） It is necessary that steps should be taken to ……
8） In conclusion, it is imperative that ……
9） There is no easy method, but ……might be of some help.
10） To solve the above-mentioned problem, we must ……
11） In summary, if we continue to ignore the above-mentioned issue, more problems will crop up.
12） With the efforts of all parts concerned, the problem will be solved thoroughly.
13） We might do more than identify the cause ; it is important to take actions to ……
14） Taking all these into account, we ……
15） Whether it is good or not /positive or negative, one thing is certain/clear……
六、其他句型
I、There be结构
There+be+主语+(修饰成分，表示客观存在的'人或事物。 There must be a lot of fuel in the tank．
There remains nothing more to be done．
There is no point in talking about it again．
There is something you don't know．
There is not enough time to do the work． ．
II、名词化结构
名词化结构用以表明抽象思维的逻辑性和概念化，从而使语体更加正式、更加具有书面语风格。
1．由of连接主谓关系
That the earth revolves around the sun causes the changes of the seasons.
名词化：The revolution of the earth around the sun causes the changes of the seasons．
2．由0f连接动宾关系
One of the most important natural phenomena is that energy is transmitted from one point to another in waves.
名词化：One of the most important natural phenomena is the transmission of energy from one point to another in waves．
3．用of连接含有by的短语，把简单句转换成名词短语
