用动词­ing形式完成句子

　　①Having written an important letter(写完一封重要的信后), I listened to the music for a while.

　　②Being well taken care of(受到了很好的照顾), she recovered quickly.

　　考点三　动词­ing形式作状语时需注意的几个问题

　　1．动词­ing形式作状语时，有时前面可用一个连词或介词，表示强调或出于表达需要。常用的连词有：when, while, after, before, if, unless, though/although等。"从属连词＋动词­ing形式"可以视为状语从句的省略。

　　Don't talk while having dinner (＝while you are having dinner)．

　　吃饭时不要说话。

　　Though working hard(＝Though he worked hard), he couldn't earn enough money to pay off his debt.

　　尽管努力工作，他也不能挣到足够的钱还清债务。

　　2．动词­ing形式的否定形式是在其前加not或never。

　　She was puzzled, not knowing what had happened.

　　她迷惑了，不知道发生了什么。

　　Not having tried his best, he failed in the exam.

　　由于没有尽最大努力，他这次考试没通过。

　　3．动词­ing形式与不定式作结果状语时的比较

　　动词­ing形式作结果状语，表示自然而然的结果。而不定式作结果状语则表示出乎意料的结果，且常与only 连用。

　　He ran all the way, reaching the school out of breath.

　　他跑了一路，到达学校时上气不接下气。

　　Yesterday I went to see him, only to learn that he had gone abroad two days ago.

　　昨天我去看他，结果了解到他两天前已经去了国外。

　　4．动词­ing形式与独立主格结构作状语时的比较

　　动词­ing形式作状语时，其逻辑主语要与主句的主语相一致，如果不一致，通常要在动词­ing形式前加上它自己的逻辑主语，这种带逻辑主语的动词­ing形式被称为独立主格结构。

　　Arriving at the station, he found the train had left.

　　到达车站时，他发现火车已经开走了。(he是arriving的逻辑主语)

　　She walked along the path, her daughter following closing behind.

她沿着小路走，其女儿跟在后面。(following的逻辑主语是her daughter，而不是