尊敬的老师们，柯林斯词典里有两个例句是We werecrouching in the bushes； The man wascrouched behind the Merchedes.
请问老师这里基本相同的意思为何一个用crouching一个用 crouched. 而且crouch是不及物动词，用crouched合不合适？
We were crouching in the bushes； The man was crouched behind the Merchedes.
结构分别等于这两句的结构：
We were hiding in the bushes； The man was hidden behind the Merchedes.
同一个动词，具备两种使用方法：一个是自动词，一个是他动词（使动使用方法，宾语是反身代词），被动式理解为主动意义。
英语中如此的动词不算少，掌握举一反3、
We were hiding in the bushes.
We were hiding ourselves in the bushes.
We were hidden in the bushes.
We should adapt to the new environment.
We should adapt ourselves to the new environment.
We should be adapted to the new environment.
结构虽不同，但意思相同。——以达成语言表达多元化。
