【例1】One teammate all of us had been thinking highly of__________dishonest.
　　A. provingB. proved
　　C. to proveD. being proved
　　解析：大多數(shù)同學(xué)看到此題，毫不猶豫地選擇了A. proving 或D. being proved.原因很簡(jiǎn)單:of是個(gè)介詞，其后應(yīng)接名詞或動(dòng)名詞。選擇A是因?yàn)閷W(xué)生覺(jué)得prove可以用作系動(dòng)詞，用主動(dòng)形式表達(dá)；選擇D是因?yàn)閷W(xué)生認(rèn)為該用被動(dòng)，“……被證明是不誠(chéng)實(shí)的”。而實(shí)際情況并非如此。在該句中有兩個(gè)可能為主語(yǔ)的部分：“one teammate”和“all of us”。由于兩者之間沒(méi)有表并列的連詞and 或or ，所以“one teammate”和“all of us”不可能同時(shí)為整個(gè)句子的主語(yǔ)。稍加分析可知，該句的最基本的句式為“主+系+表”結(jié)構(gòu)，而“all of us had been thinking highly of”為定語(yǔ)從句，需要填的選項(xiàng)和of沒(méi)有關(guān)系。原句和“ One teammate whom all of us had been thinking highly of _________dishonest.”是相等的，“whom”在定語(yǔ)從句中作介詞of的賓語(yǔ)，可以省略。當(dāng)然該句也可以寫(xiě)為：One teammate who all of us had been thinking highly of_________dishonest 或One teammate that all of us had been thinking highly of_________dishonest .另外，“prove”作為系動(dòng)詞用主動(dòng)表被動(dòng)，所以答案為B. proved .現(xiàn)在我們變換一下這個(gè)題目：改為“One teammate all of us have been thinking highly of ___________dishonest.”這時(shí)原題給的四個(gè)答案都不對(duì)。因?yàn)橛伞癶ad been thinking highly of”改為“have been thinking highly o