Difference between "considered to be" and "considered as"?

Question

Is there any difference between considered to be and considered as? For example: - Adam is considered as a good teacher. - Adam is considered to be a good teacher.

Answer 1

Considered as is rarely used in American English, and if it were used, the as is normally omitted: Adam is considered a good teacher. However, Adam is considered to be a good teacher is flagged by my built-in grammar checker, which prefers the active voice: Adam is a good teacher. So, the consensus is, use Adam is a good teacher for casual usage and Adam is considered to be a good teacher in formal instances. In my opinion, considered as would never be used in this country today.

Adam is considered a good teacher

Adam is considered to be a good teacher

Here are three instances I found while flipping through a grammar textbook:

·      Why does one say, 'I was' and 'you were,' but saying 'If I were to' is considered correct too?

·      Is 'fortnight' considered archaic now?

·      Gates recalls being considered to be Obama's running mate.