Section Ⅳ　Grammar & Writing

　　动词­ing形式作状语

　　阅读下列句子，体会黑体部分的用法

　　1．...I saw several young people enter the waiting area looking around curiously.

　　2．I stood for a minute watching them and then went to greet them.

　　3．She stepped back appearing surprised...

　　4．Then Akira Nagata from Japan came in smiling，together with George Cook from Canada.

　　5．When Darlene Coulon from France came dashing through the door...

　　动词的­ing形式(短语)可以在句中作状语来修饰谓语动词或整个句子，用来表示动作发生的时间、原因、条件、结果、让步或伴随情况。

　　一、动词­ing形式作状语的用法

　　表示时间、原因或条件时，通常位于句子的前部；表示方式、伴随或结果时，通常位于句子的后部。

　　1．作时间状语，相当于时间状语从句

　　Hearing the noise，I turned round.

　　＝When I heard the noise，I turned round.

　　听到响声我转过身去。

　　2．作原因状语，相当于原因状语从句

　　Being too young，he couldn't join the army.

　　＝Because he was too young，he couldn't join the army.

　　因为年轻，他不能参军。

3．作条件状语，相当于条件状语从句