were convinced that the animal was a puma.

题目

were convinced that the animal was a puma.
在没有宾语时采用主系表结构：be convinced,
然后紧接着举了个例子,说道：“The experts from the zoo were convinced that the animal was a puma.专家们相信了那个动物就是一只美洲豹.只是强调了专家们相信了,并没说使谁相信.我相信她是一个城市的女孩,I'm convinced that she is a honest girl.所以没有宾语的情况下要采用主系表结构.”
那么这里的be convinced不是被动语态而是系表了是吗?当没有使谁相信时,也就是没有宾语时就要使系表吗
但这是新概念第三册新东方老师讲的.
我认为CONVINECE是使.....相信,不是确信的意思.而这个句子只是专家相信,并没说使谁相信.老师应该是这个意思.所以才用BE CONVINEDE

答案

第一句：The experts from the zoo were convinced that the animal was a puma.你说的“只是强调了专家们相信了,并没说使谁相信”,我不同意,可以说成是：通过观察,专家自己让自己相信了,隐含的宾语是专家自己,可以...