题目内容
7.The sun heats the earth,_________ the air to rise and the winds to blow.( )A. | caused | B. | causing | C. | causes | D. | to cause |
分析 太阳让地球温度升高,引起空气上升,空气流动形成了风.
解答 答案:B
句中有逗号分隔,没有连词,要用非谓语动词;cause与主语the sun构成主谓关系,且句意表达的是客观事实,要用表示主动的现在分词作结果状语.故选B.
点评 现在分词是非谓语动词的一种,表达主动或进行;过去分词表达被动或完成;动词不定式表达未发生的动作.学习时,要注意区分和掌握.
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