九、考查非謂語動(dòng)詞用作主語的問題

原則上說，動(dòng)詞用作主語，只能是不定式或動(dòng)名詞，不能是分詞形式。這類考題命題還往往用動(dòng)詞原形作為干擾項(xiàng)進(jìn)行考查，同學(xué)們做題需引起注意。如：

It’s necessary to be prepared for a job interview; _________the answers ready will be of great help. (北京卷)

A. To have had        B. Having had          C. Have                D. Having

分析：答案選D。動(dòng)名詞短語用作主語。

十、考查“(be +) 過去分詞+介詞”結(jié)構(gòu)

有一類“be+過去分詞+介詞”結(jié)構(gòu)，如be interested in, be worried about, be lost in, be dressed in 等，也往往是命題的熱點(diǎn)。如：

1. _________ in the mountains for a week, the two students were finally saved by the local police. (江蘇卷)

A. Having lost          B. Lost                 C. Being lost           D. Losing

分析：答案選 B。因表示“迷路于”是lose oneself in，題中沒有oneself, 所以the two students與lose是被動(dòng)關(guān)系，應(yīng)該用過去分詞作狀語。

2. _________ in a white uniform, he looks more like a cook than a doctor. (湖南卷)

A. Dressed               B. To dress         C. Dressing              D. Having dressed

分析：答案選 A。由dress的賓語一定是人或oneself可知，dress與he是動(dòng)賓關(guān)系，即he與dress是被動(dòng)關(guān)系，要用過去分詞作狀語，Dressed in …=As he is dressed in …

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