雅思寫(xiě)作備考_因果關(guān)系表達(dá)句型

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1. 雙名詞從句式

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

解析：適用于引入原因(帶題目關(guān)鍵詞)

句型框架：主語(yǔ)從句+ is because of the 原因 +賓語(yǔ)從句(包括主從，賓從兩個(gè)名詞性從句)

例句中，people from the countryside transfer to the city 是對(duì)題目關(guān)鍵信息的復(fù)述，句型中原因部分使用一個(gè)名詞或名詞詞組。

Exercise:causes of congestion in megacities

2. 三組P+O式

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

解析：適用于解釋句，說(shuō)明三種具體原因或結(jié)論段總結(jié)原因和結(jié)果

句型框架：主語(yǔ)+P.O.1 , P.O.2 and P.O.3 . This results in doing sth.1and doing sth.2.

例句中，三組P+O (謂語(yǔ)+賓語(yǔ))是平行結(jié)構(gòu)，第二句的This 指代三組P+O; doing sth.1 是result，doing sth.2是ultimate result。

Exercise:causes of overpopulation

3. 原因+細(xì)化方面解釋 式

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

解析：適用于說(shuō)明一個(gè)原因(論點(diǎn))后緊接著把這個(gè)原因的幾個(gè)方面具體化論述。

句型框架：原因is another by-product ofwhich poses threat to 主題詞; 具體方面1，具體方面2and 具體方面3create which are V+ed .without, V+ing ..to

例句中，which are的部分是定語(yǔ)從句，Vingto是非謂語(yǔ)用法。

Exercise:cyber crime

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

Some people believe that global warmingis a result of burning fossil fuels, as this causesincreased carbon dioxidein the atmosphere.

解析: 這里我們把造成global warming (result)的原因分為burning fossil fuels(root cause)和increased carbon dioxide(cause), 原因和根本原因，然后用適合的句式組織起來(lái)，使得邏輯論證層次更豐富。

句型框架： Some people believe that (result) is a result of(root cause), as this causes .(cause).

具體的句式組織還可以是以下五種，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)

5. 雙非謂語(yǔ) 結(jié)構(gòu)

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

解析：把問(wèn)題的原因和具體結(jié)果都用非謂語(yǔ)形式體現(xiàn)，主語(yǔ)只說(shuō)關(guān)鍵詞造成問(wèn)題(概括性的名詞)，即air pollutionposes serious health concerns.

句型框架：關(guān)鍵詞 resulting from andposes serious concerns, consideringas well as

例句中，描述air pollution 的形成原因部分resulting from和造成的健康問(wèn)題具體包括什么considering都使用的是非謂語(yǔ)形式。

Exercise: cause and effect of social networking

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