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本期高阶因果关系表达中，辛达雅思代报小编将带领各位烤鸭们对因果关系表达进行晋级，让你成为逻辑高手。

我们在学习句型的结构后，一定要试着完结每种句型后的练习标题，答案会在文末发布。

1. 双名词从句式

Another reason why people from the countryside transfer to the city is because of the modern conveniencesthat city living brings.

解析：适用于引入原因（带标题关键词）

句型结构：主语从句+ is because of the 原因 +宾语从句 (包含主从，宾从两个名词性从句)

例句中，people from the countryside transfer to the city 是对标题关键信息的复述，句型中“原因”部分运用一个名词或名词词组。

Exercise:causes of congestion in megacities

2. 三组P+O式

Today more and more people rely on cars instead of walking, have less physical demands at work and prefer inactive leisure activities. This results inburning less caloriesand gaining weight.

解析：适用于解说句，阐明三种具体原因或定论段总结原因和成果

句型结构：主语+ P.O.1 , P.O.2 and P.O.3 . This results in doing sth.1 and doing sth.2.

例句中，三组P+O (谓语+宾语)是平行结构，第二句的”This” 指代三组P+O; doing sth.1 是result，doing sth.2是ultimate result。

Exercise: causes of overpopulation

3. “原因+细化方面解说” 式

Effluents are another by-product of industries which poses threat to the environment;leather and tanning industries, petroleum industries and chemical manufacturing industries createmajor waste products which are released directly into nearby streams without treatment, creating river pollution and causing harm to aquatic life.

解析：适用于阐明一个原因（观点）后紧接着把这个原因的几个方面具体化论述。

句型结构：原因 is another by-product of … which poses threat to 主题词; 具体方面1，具体方面2 and 具体方面3 create…which are V+ed ….without…, V+ing …..to …

例句中，which are…的部分是定语从句，Ving…to…是非谓语用法。

Exercise:cyber crime

4. X(root cause), Y(cause), Z(result)式

Some people believe that global warming is a result of burning fossil fuels, as this causes increased carbon dioxide in the atmosphere.

解析: 这儿咱们把形成global warming (result)的原因分为burning fossil fuels(root cause)和increased carbon dioxide(cause), 原因和根本原因，然后用合适的句式安排起来，使得逻辑证明层次更丰厚。

句型结构： Some people believe that …(result) is a result of … (root cause), as this causes ….(cause).

具体的句式安排还可所以以下五种，R（result）, C(cause), RC (root cause):

?(R) has been directly affected by (RC), as this allows for (C).

?As a result of (RC) leading to (C), (R) has been possible.

?(RC), thus allowing for (C), has resulted in (R).

?(RC) results in (C), which in turn leads to (R).

?Given (RC), it follows that (C) would mean (R)

Exercise: cause and root cause of obesity

5. “双非谓语” 结构

Air pollution resulting from the factory and vehicle emissionposes serious health concerns, considering the irritation of the eyes, nose, and throat, as well as increased risk of heart attack.

解析：把问题的原因和具体成果都用非谓语方式表现，主语只说关键词形成问题（概括性的名词），即air pollution poses serious health concerns.

句型结构：关键词 resulting from… and … poses serious …concerns, considering … as well as…

例句中，描绘air pollution 的形成原因部分resulting from和形成的健康问题具体包含什么considering都运用的是非谓语方式。

Exercise: cause and effect of social networking

句型虽好，可不要贪心。具体写作时并不是复杂句越多越好，一篇文章中用1-2个这样的句型就可以，大多数仍是要运用根底句型，逻辑明晰，精确表达更重要。

Answer :

This is only a possible version; you can create other correct sentences with the same structure

Exercise 1: causes of congestion in megacities

The reason why traffic congestion in megacities is increasing is because of the excessive growth of vehicle numbers that growing population brings.

Exercise 2: causes of overpopulation

Today, the advanced science have offered better medical facilities, promoted fertility treatment, and brought down death rate. This results in increasing population growth and becoming overpopulated gradually.

Exercise 3: cyber crime

Cyber-crime is another by-product of technology advancement which poses threat to the social security; internet fraud, online piracy and spread of violent and pornographic content create great risks which are available easily on the web without screening, causing harm to the social order.

Exercise 4: cause and root cause of obesity

Some people believe that obesity is a result of inactive life, as this causes less exercise and over eating.

Exercise 5: cause and effect of social media

Development of social networking resulting from technological advancement and fast-paced modern life poses serious social concerns, considering gradually alienated relationship between people, as well as deteriorated interpersonal communication skills.

小编找到的是作者的一些见解，希望可以为考生们寻找到最好得分方式，也希望对大家有所帮助。最后，希望广大考生们在备考过程中提升自己的语言水平，取得更好的成绩。

有需要代报考位的同学们，可以直接联系我们，辛达雅思代报竭诚为您服务。(*^__^*)