英语语法详解--ed分词（一）
内 容 提 要-ED分词即我们平常所说的动词过去分词。它有两种形式：规则动词形式和不规则动词形式。规则动词形式由规则动词＋-ED构成；不规则动词有其特殊的-ED分词。在语法功能上，它在句子中所能承担的成分基本与-ING分词相同，可以作表语，定语，状语，也可以用在复合结构中，不管它作什么成分，其最基本的含义是"被动"的。-ED分词在语法功能和意义上与-ING分词有一定的区别。
第一节 -ED分词的用法
一、-ED分词作表语
The glass is broken. / He was amused. / She seemed quite disappointed. / He is greatly discouraged by her refusal of inviting her to the party. / The window remains locked.
已经形容词化了的-ED分词大都作表语，常见的有：accomplished, amazed, amused, astonished, broken, closed, completed, complicated, confused, crowded, deserted, devoted, disappointed, discouraged, dressed, drunk, exhausted, excited, experienced, fadded, fascinated, frightened, hurt, inexperienced, interested, known, learned, lost, married, pleased, puzzled, qualified, satisfied, surprised, tired, unprepared, unqualified, unkown, upset, worried, wounded等。
二、作定语的-ED分词
-ED分词可以作前置定语也可以作后置定语，作后置定语时相当于一个定语从句
1) Commercial banks make most of their income from interest on loans and investments in stocks and bonds.
［A］ earn ［B］ earned ［C］ to earn［D］ was earned
2) On his return from his college, he found the house .
［A］ deserting［B］ deserted［C］ desert［D］ to be deserted
3) The age ［A］ of a geological sample can be estimated ［B］ from the ratio of radioactive to nonradioactive carbon present ［C］ in the object is examined ［D］ .