题目内容
2. 30-60minutes before the voyage,the medicine is very effective against seasickness.( )A. | Take | B. | Taking | C. | To take | D. | Taken |
分析 航行前半个小时到一个小时服用这种药,可以有效地防止晕船.
解答 答案:D 句中有逗号分隔,没有连词,要用非谓语动词;句中take与主语the medicine之间构成动宾关系,要用表示被动的过去分词作条件状语.
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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