-ed分詞可以作前置定語(yǔ)也可以作后置定語(yǔ)，作后置定語(yǔ)時(shí)相當(dāng)于一個(gè)定語(yǔ)從句。
1.-ed分詞可以作前置定語(yǔ)，此時(shí)，分詞與名詞之間有兩種語(yǔ)義關(guān)系：一種是分詞表示主動(dòng)意義;一種是分詞表示被動(dòng)意義。如：
He is a retired worker.
他是一個(gè)退休工人。
This is a newly-developed device.
這是一個(gè)新開(kāi)發(fā)的工具。
2.-ed分詞作后置定語(yǔ)時(shí)，其功能相當(dāng)于一個(gè)定語(yǔ)從句。如：
She likes to drink cold boiled water.
他喜歡喝涼白開(kāi)。
They were inspecting the houses damaged by the storm.
他們正在視察被暴風(fēng)雨毀壞的房屋。
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
解析：B為正確答案。空檔前是一完整的句子，在沒(méi)有連詞的情況下，不能填充A和D;根據(jù)題意，“利息”是“通過(guò)…(被)掙來(lái)的”，有被動(dòng)之意，所以選B。
2) On his return from his _______ college, he found the house.
[A] deserting
[B] deserted
[C] desert
[D] to be deserted
解析：B為正確答案。此句的意思是“房子”被“遺棄，沒(méi)人住”，是被動(dòng)的意義，而A和C都不符合這一點(diǎn)。D是動(dòng)詞不定式，一般表示將來(lái)或具體動(dòng)作，所以D也不對(duì)。
3) 改錯(cuò)：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].
解析：D錯(cuò)。應(yīng)去掉多余的“is”，使-ED分詞“examined”作后置定語(yǔ)修飾“object”。C處并沒(méi)有錯(cuò)。“present”是形容詞，它與后面的成分構(gòu)成形容詞短語(yǔ)修飾限定前面的“the ratio...carbon”。
