The teacher told us that everyone has an important role ________in protecting the earth from________.
A.to play; to polluteB.to be played; to be polluted
C.to play; being pollutedD.to be played; being polluted
C

試題分析:考查不定式和固定搭配。本句中的不定式to play是用來形容名詞role;第二看是固定搭配protect sb from doing sth阻止某人做某事;句意:老師告訴我們在阻止地球被污染的過程中,我們每個人都會起重要的作用。第一句中的不定式充當(dāng)定語,修飾role;因為這個動作是句子主語所作,故使用主動的形式。根據(jù)句意說明第二空中使用動名詞的被動形式。故C正確。
點評:非謂語動詞是指在句子中不是謂語的動詞,主要包括不定式、動名詞和分詞(現(xiàn)在分詞和過去分詞),即動詞的非謂語形式。非謂語動詞除了不能獨立作謂語外,可以承擔(dān)句子的其他成分。對于英語中的固定用法,平時要多歸納總結(jié),固定用法的特殊語法規(guī)則更要特別記憶。最好把固定短語放在句子中,連同句子一起記憶,這樣能夠加強記憶。
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