题目内容
19．______ from their parents for half a year，the students couldn't wait to go back home．（ ）| A． | Separating | B． | To be separated | ||
| C． | Having separated | D． | Having been separated |
分析 与他们的父母分离半年后，这些学生迫不及待地回家．
解答 答案是D．本题考查现在分词完成式的被动语态；现在分词完成式强调先后关系，强调分词的动作在谓语动词之前已经发生或完成；本题强调先后关系，并且separate与主语the students之间是被动关系，故选D．
点评 首先判断选项中的动词在句中是以谓语还是非谓语形式出现，然后根据选项在句中的功能结合非谓语的基本用法做出合理的判断．要关注常见非谓语动词的搭配．
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