Learn German: Wie ich erwähnt habe, ist das Archiv wichtig. - As I mentioned, the archive is important.

In this context, wie acts as a subordinating conjunction to reference something previously stated or already known. When paired with communication or knowledge verbs like erwähnen (to mention), sagen (to say), or wissen (to know), wie translates to "as". For example: Wie du weißt means "As you know".

Wait, doesn't als also mean "as"? Why can't I say Als ich erwähnt habe?

It is true that als often translates to "as", but it is only used for roles or identities (like working als a teacher) or comparisons. When you want to say "as I said" or "as we saw" to reference a statement or shared knowledge, you must use wie.

Why does the verb ist come right after the comma instead of das Archiv?

This is a great example of the verb-second rule! The entire subordinate clause (Wie ich erwähnt habe) counts as the first position of the overall sentence. To keep the main verb in the strict second position, ist must come immediately after the comma, pushing the subject (das Archiv) to the other side of the verb.

Why is habe at the very end of the first clause instead of next to ich?