来自2021年底的结论：以前是加上as也行，但现在对于native speaker来说，不加as最地道。
以下参考2008年编辑Peter Sokolowski的解答 网页链接
关于"Consider" and "consider as"，以下四对表达中，哪个句子更地道？
He considers me as his best friend.
He considers me his best friend.
These workers are considered as a high-ranking group.
These workers are considered a high-ranking group.
I consider him as clever.
I consider him clever.
I consider activities such as jogging and weightlifting as unnatural.
I consider activities such as jogging and weightlifting unnatural.
编辑Emily Brewster的回答是：
这四对表达中，不加as的更符合习惯表达 （more idiomatic）。也需要注意到，Merriam-Webster's Concise Dictionary of English Usage中有关consider的描述是："加上as的表达在以前更常用，现在不怎么用。尽管如此，consider ... as依然是标准的用法。"
Peter Sokolowski的回答是：尽管如此，以下表达对我来说更自然、更常见：
He considers me (to be) his best friend.
These workers are considered (to be) a high-ranking group.
I consider him clever.
I consider activities such as jogging and weightlifting unnatural.
以下对consider单词的解释中，例句中均没有出现as：
3 [+ obj] : to think of or regard (someone or something) in a specified way
▪ I consider the price (to be) too high.
▪ We consider careful work (to be) essential.
▪ We consider it an honor to have you here with us tonight.
▪ a television program that is considered one of the best comedies ever
▪ He considers himself to be a great writer.
▪ Consider yourself lucky/fortunate that you survived the accident. [=you are lucky to have survived the accident]
可以看出，consider + as 的结构越来越不常用了。