啡友L说动词promise的过去分词跟着连词(conjunction)用的as，成为as promised，常见用者——特别是在商业通信中。（www.51education.net整理）一家公司答应寄送样品给客户，附函中说：We are sending you the sample, as (we) promised。（www.51education.net整理）会话中用以声明会照办事先说好的事情。（www.51education.net整理）例如你借了朋友一本书，久久未还。（www.51education.net整理）朋友偶然问起，你说明天一定奉还：I'll bring the book back tomorrow, as(I)promised，表示当初说了要还，一定会还。（www.51education.net整理）

　　As加动词过去分词，省略as之后的主语和动词be作为从句，是相当简洁的表现方式，多见于新闻英语中。（www.51education.net整理）要注意的是如果时制和主句不同，be动词部分不能省略。（www.51education.net整理）例如论斯里兰卡政局者说该国的权力曾经多次证明不是通过劳动阶级所能取得：The way to power in Sri Lanka is not through the working class, as has been proved time and time again。（www.51education.net整理）主句中用现在时制，从句中非用现在完成时制不可，虽然略去了作为从句主语之it。（www.51education.net整理）再看：A spokesman said about ten targets were struck as planned。（www.51education.net整理）“一如原定计划”，as planned足矣。（www.51education.net整理）（寄自香港）