关于seat的用法When all those present ______ he bagan his lecture.为什么横线处填were seated呢?为什么用被动语态.

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关于seat的用法Whenallthosepresent______hebaganhislecture.为什么横线处填wereseated呢?为什么用被动语态.关于seat的用法Whenallthos

关于seat的用法When all those present ______ he bagan his lecture.为什么横线处填were seated呢?为什么用被动语态.
关于seat的用法
When all those present ______ he bagan his lecture.
为什么横线处填were seated呢?为什么用被动语态.

关于seat的用法When all those present ______ he bagan his lecture.为什么横线处填were seated呢?为什么用被动语态.
he bagan his liceure 这是主句.他开始他的演讲.
seat 及物动词,后面要加宾语的,但是这个后面没有宾语,只能变成被动语态.被动形式be done

be seated 是固定搭配。。跟时态无关

1. sit是不及物动词,只能说Sb/sth sit (介宾/副词)
2. seat是及物动词,结构是seat sb/oneself (介宾/副词)
所以说某人坐在哪里用sb be seated (介宾/副词).
如: His parents sat on the sofa.
=His parents were seated on the sofa.