as a teacher意思是：作為一個老師，強調老師這個狀態，as為介詞一般用來做條件狀語。
being a teacher 一般用來做獨立結構或者現在分詞用來充當句子成分。
例句辨析：
as a teacher
1、She began her career as a teacher.
她開始了自己的教師生涯。
2、Your own personal behavior as a teacher, outside of school hours, reflects on the school itself.
作為教師，你在課堂以外的個人行為會影響人們對學校的印象。
3、I would judge that my earnings as a teacher have, over the years, been considerably below those of Mr Foot.
我估計，這些年來，我當老師的收入要比富特先生的收入低不少。
being a teacher
1、I love being a teacher, because I like being with students.
我喜歡教師這個職業，因為我喜歡和學生在一起。
2、I just think I"m not worth being a teacher any more.
我在想我可能不再有做個教師的資格了。
3、I"m fond of literature and foreign language and have long dreamed of being a teacher.
喜愛文學和外語的我，一直夢想著能做一名教師。
as a teacher意思是：作為一個老師，強調老師這個狀態，as為介詞一般用來做條件狀語。
being a teacher 一般用來做獨立結構或者現在分詞用來充當句子成分。
例句辨析：
as a teacher
1、She began her career as a teacher.
她開始了自己的教師生涯。
2、Your own personal behavior as a teacher, outside of school hours, reflects on the school itself.
作為教師，你在課堂以外的個人行為會影響人們對學校的印象。
3、I would judge that my earnings as a teacher have, over the years, been considerably below those of Mr Foot.
我估計，這些年來，我當老師的收入要比富特先生的收入低不少。
being a teacher
1、I love being a teacher, because I like being with students.
我喜歡教師這個職業，因為我喜歡和學生在一起。
2、I just think I"m not worth being a teacher any more.
我在想我可能不再有做個教師的資格了。
3、I"m fond of literature and foreign language and have long dreamed of being a teacher.
喜愛文學和外語的我，一直夢想著能做一名教師。