3．It rained heavily in the south，causing （cause） serious flooding in several provinces．

分析 南方雨下得很大，結(jié)果在幾個省引起了洪水．

解答 答案是causing．本題考查現(xiàn)在分詞做結(jié)果狀語．根據(jù)句子結(jié)構(gòu)判斷，句中已經(jīng)有了謂語動詞rained，所以cause必須用非謂語的形式；根據(jù)語境判斷大雨導(dǎo)致的結(jié)果是幾個省發(fā)洪水，句中需要的是結(jié)果狀語；非謂語動詞中動詞不定式和動詞-ing形式都可以做結(jié)果狀語，動詞不定式表示"出乎預(yù)料的、令人沮喪的結(jié)果"；動詞-ing形式表示"自然而然的結(jié)果"，句中顯然是"自然而然的結(jié)果"，所以用現(xiàn)在分詞causing．

點評 本題是要求用所給詞的適當(dāng)形式填空，解題時首先考慮句中需要的詞性；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；如果是名詞關(guān)注單復(fù)數(shù)．

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