Question

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？．

Answer 1

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．