12．Anyone who is caughtcheating （cheat） at exams will be severely punished for his foolish behavior．

分析 任何考試作弊被當(dāng)場抓住 人會因?yàn)樗挠薮赖男袨槭艿絿?yán)厲懲罰．

解答 答案是cheating．題干中包含了who引導(dǎo)的定語從句，從句中已經(jīng)有了謂語動詞is caught，所以cheat應(yīng)該用非謂語的形式；此外，catch sb．doing sth．表示"當(dāng)場抓住某人在做某事"，其中doing和賓語sb．之間的主動關(guān)系并且表示與謂語動詞同時進(jìn)行；其相應(yīng)的被動結(jié)構(gòu)是"sb．be caught doing"，故答案是cheating．

點(diǎn)評 本題是要求用所給動詞的適當(dāng)形式填空，解題時首先考慮句中需要的是謂語動詞還是非謂語動詞；其次，如果是謂語動詞關(guān)注時態(tài)、語態(tài)和數(shù)的變化；如果是非謂語動詞要聯(lián)系非謂語的基本用法判斷非謂語的形式．

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