Questions & Answers about Ik zie een nieuw detail in elke fase.
Could I use iedere instead of elke in this sentence?
Yes, absolutely! Elke and iedere both mean "every" or "each" and are usually interchangeable. Some native speakers feel that elke emphasizes the individual items a bit more (like "each phase"), while iedere feels slightly more collective (like "every phase"). However, grammatically and in everyday conversation, in iedere fase is just as correct here.
Why does elke have an -e at the end here?
It gets an -e because fase is a de-word (de fase). The determiners elk and ieder both get an -e ending when used with de-words. If the noun were a het-word, like detail, you would drop the -e and use the uninflected forms: elk detail or ieder detail.
Why is it een nieuw detail and not een nieuwe detail?
Because detail is a het-word (het detail). As a refresher: when a singular het-word follows the indefinite article een, the adjective before it drops its -e ending. If you were talking about the new detail instead of a new detail, the -e would return: het nieuwe detail.