“All the brethren were in Egypt except Arnab”. In the following sentence “except” is used as a/ an -

The word ‘except’ can be used in various forms as parts of speech such as -
- All the brethren were in Egypt except Arnab. - As a Preposition
- If we except Jafor, we may lose the game. - As a Verb
- I will not let you go except (unless) you bless my children. - Conjunction