作者：郝昌明
一、在不知道動(dòng)作的執(zhí)行者是誰(shuí)時(shí)
You are wanted on the phone. 有你的電話。（不知道是誰(shuí)請(qǐng)你接電話）
Everything has been taken away. 一切都被拿走了。（不知道是誰(shuí)拿走的）
These books are written for children. 這些書是為孩子們寫的。（誰(shuí)寫的不知道）
二、當(dāng)動(dòng)作的執(zhí)行者是泛指或不言自明時(shí)
Not a book in the library has been taken away. 沒有一本書在圖書館里被人帶走。（泛指任何人）
China was liberated in 1949. 1949年中國(guó)解放。（不言而喻是中國(guó)共產(chǎn)黨解放的）
三、雖然可以說(shuō)出動(dòng)作的執(zhí)行者，但動(dòng)作的承受者是談話中心或特別需要強(qiáng)調(diào)時(shí)
My watch has been repaired. 我的表修好了。（表修好了是談話的主旨，是誰(shuí)修好不必提及）
At last an agreement was arrived at. 終于達(dá)成了一項(xiàng)協(xié)議。（重要的是達(dá)成協(xié)議）
She is liked by everyone in our class. 班里每個(gè)人都喜歡她。（強(qiáng)調(diào)她）
四、出于委婉、禮貌而避免提及自己或?qū)Ψ綍r(shí)
Enough has been said on this question. 關(guān)于這個(gè)問(wèn)題已經(jīng)談得不少了。（大家不要再說(shuō)了）
You are wished to do it more carefully.希望你認(rèn)真一點(diǎn)兒做。（誰(shuí)希望，不愿或不便說(shuō)出來(lái)）
五、當(dāng)人不是動(dòng)作的執(zhí)行者時(shí)
We are all shocked by the news of his sudden death. 他的突然去世使我們大家都感到震驚。
The house has been washed away by the flood.房子已被洪