-ing形式作状语,可以表示时间、原因、结果、条件、让步、行为方式、伴随状况等。如:

　　Being a teacher, you should help your students in every way.(原因)

　　He died from a sudden traffic accident, leaving the experiment half-done (so that he left the experiment half-done).(结果)

　　Seeing my parents waving in the crowd, I went running to them.(时间;方式)

　　The students entered the classroom, following their English teacher.(伴随)

　　Listening to English every day (If you listen to English every day), you’ll learn it well step by step. (条件)

　　学习-ing形式作状语的用法时,需要注意以下四点:

　　(一) 与过去分词作状语的区别。 
一般来说,-ing形式表示主动、进行;过去分词表示被动、完成。试比较:

　　The enemy fled in a panic, leaving behind a lot of dead bodies and weapons.

　　Defeated and frightened, the enemy fled in a panic.

　　分析:前一例中的-ing形式短语在句子中作伴随状语,它与其逻辑主语the enemy之间为主动关系;后一句中的过去分词defeated和frightened表原因,它与其逻辑主语the enemy之间为被动关系。

　　(二) 关于逻辑主语的问题。-ing形式作状语时,一般情况下,其逻辑主语应与主句的主语保持一致。如:

　　Comparing all the great people with each other, you’ll find that they have much in common.

　　Finding her car stolen, she hurried to a policeman for help.(上海2001,28)

　　Having suffered from heart trouble for years, Professor White has to take some medicine with him wherever he goes.(上海2001春,38)

　　Having suffered such heavy pollution already, it may now be too late to clean up the river.(NMET 2001, 35)

　　分析:前三例中,-ing形式的逻辑主语均为主句的主语。最后一例中,having suffered的逻辑主语是the river,并不是主句的主语it。这种用法极为少见,有的语法家称其为垂悬分词,我们在学习中不宜模仿。

　

 

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