上文學習的左二右六原則，適合分析一句話，即使句子很長，句子的主干只有一個。還有一些長句是由很多短句組成，每個短句由逗號隔開，這種帶逗號的長難句需要通過懸掛結(jié)構(gòu)來分析。

懸掛結(jié)構(gòu)的表現(xiàn)形式為X，SVO（主謂賓）或SVO，X

其中X即為懸掛的成分，也是分為六種：

1、名詞n. svo

l like the Great Wall，one of the eight wonders in the world.

很明顯one of the eight wonders in the world是the Great Wall 的解釋說明，名詞性短語懸掛就是做解釋說明的，而且有個原則：就近原則，就是說這個懸掛的名詞短語離得誰近就是解釋誰的。

2、形容詞adj svo

Beautiful as Anne Hathaway, the girl is the most welcomed one in her school.

這個句子的主語是這個女孩，和安妮海瑟薇一樣漂亮的Beautiful as Anne Hathaway修飾主語the girl，形容詞短語的懸掛是和主語關聯(lián)的。

3、動詞：to do SVO

To prove English,l choose to learn from Allen.

主語我I 為了提高英語to prove English，to do結(jié)構(gòu)的懸掛成分也是和主語關聯(lián)。

4、動詞：doing，衍生：when doing/by doing/after doing/before doing

doing svo

Standing on the top of the mountain, l saw the whole Beijing.

我站在山頂上，我看到整個北京城，doing懸掛成分Standing on the top of the mountain和主語I 相關聯(lián)

He sat under the tree, reading a book.關聯(lián)主語

The song is sung all over the country, making it the most popular song.這是一種比較特殊的情況，doing懸掛成分making it the most popular song說的不是主語the song 而是，前面The song is sung all over the country這一整句話。

when doing svo:

When doing homework, I felt sleepy.

by doing svo：

By learning the cooking skill, she can cook now.

5、動詞：done svo

Buil in 1979, our school is an old school

He entered the room, followed by his dog.

6、動詞：having done svo

Having been given a map, we found our way easily。

綜上可以得出，除了名詞性懸掛成分是就近原則，其余的都是和主語關聯(lián)，分析帶有逗號的長句時運用本文懸掛結(jié)構(gòu)的內(nèi)容可以快速找到短句之間的邏輯關系。

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