按照语法规则,现在分词短语作状语时,其逻辑主语应当与句了主语一致(这种规则叫做“依附规则”),否则,即认为是错误的(即“悬垂错误”)。比较:(1)Looking out through the window,we saw a beautiful land-scape.(2)(误)Looking out through the window,a bird flew away.分析与总结:例(1)中状语分词的逻辑主语是句子的主语we,该句是正确的。例(2)中的状语分词的逻辑主语不是句子 According to the grammatical rules, when a participial phrase is an adverbial modifier, its logical subject should be consistent with the sentence subject (this rule is called “attachment rule”), otherwise it is considered as wrong (ie, “dangling error”). (2) (mistaken) Looking out through the window, a bird flew away. Analysis and Conclusion: Example (1) in the logical terms of adverbial participle Is the subject of the sentence we, the sentence is correct. The logical subject of an adverbial participle in Example (2) is not a sentence