题目内容
At that moment，he was last __________ the room with his friends．
| A．seen leaving | B．to see leave | C．seen to leaving | D．to see to leave |
A
解析试题分析：句意：在那时，有人看见他最后一个和朋友离开房间。结合语境可知本句主语是动作对象，故用被动语态。现在分词作状语表示正在进行的伴随性动作，和句子主语是主谓关系，结合语境可知选A。
考点：被动语态及非谓语动词
点评：此类题型主要是确定句子主语与谓语动词的关系。如果是主动关系则用主动语态，反之如果是动宾关系，则用被动语态。注意一些接不带to的不定式做宾语补足语的动词用作被动语态时，不定式符号to要加上。非谓语动词的用法比较固定，区别的主要办法一是和被修饰词的关系。一般现在分词和被修饰词是主谓关系，过去分词和被修饰词是动宾关系。二是表示动作状态的不同，现在分词表示正在进行的伴随性动作，过去分词表示发生过的被动的动作，不定式表示具体的将要进行的动作。掌握这两点，基本就能完成此类问题。
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