摘要：不及物动词及部分由不及物动词构成的短语不用于被动语态.常见的词和短语有:appear, rise , die , happen , occur , lie , belong to , break out , take place等. 例如:This book belongs to him. A fire broke out last night.
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动词的分类：行为/实义动词、及物与不及物动词、瞬时与持续动词、状态与动作动词、 助动词、情态动词与连系动词
1. There is someone knocking at/on the door. Who ________ it be?
A) may B) will C) can D) must
查看习题详情和答案>>1)Police said the accident occurred about 4∶30 p.m．
2)This small tree also occurs in central and southern India．
3)The though of giving up never occurred to me．
occur为不及物动词，“to happen, especially unexpectedly”，如上面例句中的________；“come into sb's mind suddenly”，如上面例句中的________；“to exist or be found somewhere”，如上面例句中的________。