英語六級-完形語法關鍵句385. He could not plead ignorance as his excus

385. He could not plead ignorance as his excuse; he should have known what was happening in his department.

譯文　他不能以不知道做借口為自己辯護；他應該知道在自己的部門里發(fā)生了什么事。

點睛　plead意為“辯護；懇求”。如：

He pleaded with his mother to allow him to go to the circus. 他請求母親答應他去看馬戲。

ignorance意為“無知”。如：

I regret my ignorance on the subject. 我為自己對這個課題的無知感到遺憾。

第二個分句中的should have known即“should＋have＋過去分詞”結構。should have done sth.表示“本應做某事而沒有做”，shouldn't have done sth.表示“做了本不應做的事”。如：

1) You should have come back earlier. 你本應早點回來。（實際上沒早回來）

2) You shouldn't have gone there yourself. 你本不應該自己去那里。（實際上自己去了）

考點歸納　excuse通常作名詞，意為“借口”，如在本句中。但是excuse也可以作動詞，表示“為……找借口；原諒”。如：

She stood up, excused herself and walked out of the meeting. 她站起身來，為中途離開致歉，然后走出會場。

Please excuse my bad handwriting. 請原諒，我的字寫得不好。