9．     the course very difficult，she decided to move to a lower level．（　�。�
A．FindB．FindingC．To findD．Found

分析 句意為：她發(fā)現(xiàn)這門課程非常難，決定轉(zhuǎn)學(xué)一門較低水平的（課程）．

解答 答案：B  本題使用排除法． 根據(jù)句子結(jié)構(gòu)可知，the course very difficult在句中作原因狀語(yǔ)（非謂語(yǔ)），因此排除A選項(xiàng)；find的邏輯主語(yǔ)是she，并且存在主動(dòng)關(guān)系，因此排除D選項(xiàng)；C選項(xiàng)表示目的，根據(jù)句意可以排除；she與find之間是邏輯上的主動(dòng)關(guān)系，故用現(xiàn)在分詞短語(yǔ)作狀語(yǔ)．所以本題選擇B．

點(diǎn)評(píng) 非謂語(yǔ)動(dòng)詞的判定方法：考慮句中謂語(yǔ)動(dòng)詞以及其它詞語(yǔ)同非謂語(yǔ)動(dòng)詞的關(guān)系和對(duì)非謂語(yǔ)動(dòng)詞形式的限制，以便選用正確的非謂語(yǔ)動(dòng)詞形式．

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