If _ _ _ _ _ to look after lu…——2013 高考英语第 34 题答案解析

【答案】A

【解析】句意为：如果有人要你照看一下李，立即s戊警察帮。主句$inform the police at once=You can inform the police at once.$隐含了一个主语you.If 状语从.勺中 ask与主句主you含着逻辑被动关系，所以用过去分词 asked

【考点定位】非谓语动词的考查。定式作状语表目的/结果原因等。 如We all jumped with great joy to hearthe news that our cour y would have joined WTO by the end of the year.使用现 在分词作状语时，分词动作的执行者必须是句子的主语。如Whistling the merry tune, Jack fixed the tire.过去分词作 状语，用来说明谓语动作发生的背景或情况（有时分词动作的受施者是句子的主 语.) Looked at in this way, the situation doesn't se em so dispointing.