下面是學(xué)習(xí)啦小編整理的英語四級作文必備知識：獨立主格結(jié)構(gòu)，以供大家學(xué)習(xí)參考。

　　獨立主格結(jié)構(gòu)指帶主語的動詞分詞、介詞、或副詞詞組。 何謂獨立主格結(jié)構(gòu)?

　　它是指與主語之間無任何語法關(guān)系的名詞或代詞加上一個分詞的結(jié)構(gòu)。它不修飾單個的詞，而修飾整個句子。獨立主格結(jié)構(gòu)可位于句子的任何部位。它構(gòu)成一個單獨實體，并具有如下兩種功能：(1) 解釋原因或情景 (2) 提供主句中重點部分的相關(guān)細節(jié)。

　　例 Freud distinguished three kinds of anxiety, each arising from a different source of perceived danger.

　　"each" 是獨立主格結(jié)構(gòu)，"arising from"是動詞短語。注意這個獨立主格結(jié)構(gòu)是一個"干巴巴"的句子。通過改變動詞形式，它的面貌可煥然一新：Each arises from a different source of perceived danger.

　　再看以下例句

　　Before: His nose was running and his hands were shaking. He left the theater like that.

　　Interesting: His nose running and his hands shaking, he left the theater.

　　Before: He is known for his bad temper, so I fear the encounter.

　　Interesting: I fear the encounter, his temper being what it is.

　　Plain: If the weather is favorable tomorrow, we will spend the entire day climbing Huang Shan.

　　Good: Weather permitting, we will spend the entire day tomorrow climbing Huang Shan.

　　Plain: Let’s pray that the Southeast Asian economy will soon return to normal.

　　Good: The Southeast Asian economy, God willing, will soon return to normal.

　　Plain: Early radio reports exaggerated the success of the raid on the Embassy. Some even indicated that the Vietcong had occupied several floors of the building.

　　Better: Early radio reports exaggerated the success of the raid on the Embassy, some even indicating that the Vietcong had occupied several floors of the building.

　　Plain: Even though the drug controversy was still festering around him, in the end, defending Australian Open champion Petr Korda walked away with a salute to a cheering crowd.

　　Better: In the end, defending Australian Open champion Petr Korda, the drug controversy around him still festering, walked away with a salute to a cheering crowd.

　　有些短語在語法上可與它所在句中的其它成分分離。這種結(jié)構(gòu)不修飾句子的任何一個詞，而修飾句子的整體意思。

　　分詞連同它所修飾的名詞或代詞可構(gòu)成獨立主格結(jié)構(gòu)。同位語和插入語有時也被認為是獨立主格結(jié)構(gòu)

　　有用句型

　　During the early years of the Cultural Revolution, dried mushrooms on dinner tables were an unheard-of luxury, and pork chops unthinkable.

　　We see Van Gogh in the role of prophet in "Self Portrait," his emaciated, luminous head with its burning eyes set off against a whirlpool of darkness.

　　Professor Wang’s handwriting was precise, fussy, spidery, his notepad pale mauve.

　　(主語+系動詞+形容詞, +獨立主格結(jié)構(gòu)<主語+形容詞>)