题目内容
9．你能猜猜我叔叔买这个机器人多久了？Can you guess how long my uncle has had the robot？．
分析 Can you guess how long my uncle has had the robot？
解答 答案：Can you guess how long my uncle has had the robot？这里需要用宾语从句来表达，主句是你能猜猜，用含有情态动词can的一般现在时，是一般疑问句将can放句首，主语you，后加动词原形guess猜，故Can you guess．后面是宾语从句，时态不受限制，买buy这个动作发生在过去，持续了一段时间，用现在完成时have/has+过去分词，多久用疑问词how long，后加陈述句语序，主语my uncle，故has，buy是短暂性动词，不能与how long连用，换成have，have的过去式had，这个机器人the robot，故答案是Can you guess how long my uncle has had the robot？
点评 宾语从句的三要素：引导词，时态和语序，要牢记．
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