有一读者问： 有这样一个句子：
But they are also called frightening and dangerous, and that they are — in the night, in the fog, and in storms.
此句中frightening and dangerous是否是形容词用作宾语补足语？
“主语+被动语态be called”之后一般应接名词，此处的frightening and dangerous可看作被名词化了的形容词，用作主语补足语；动词call在此有describe的含义。又be called后的词语的功用是主语补足语，不是宾语补足语。
