Learn German: Würden Sie bitte den Keks reichen? - Would you please pass the cookie?

Würden is the Konjunktiv II form of werden. In German, just like in English, we use this form to make polite requests. Saying Würden Sie... (Would you...) is much more polite and hypothetical than Werden Sie... (Will you...).

Why is the verb reichen at the very end of the sentence?

This is a classic German sentence structure rule! When you use a helper verb like würden, it takes the main verb slot (here, position 1 because it's a yes/no question). The actual action verb (reichen) gets pushed to the very end of the clause in its infinitive (dictionary) form.

Why is it den Keks and not der Keks?

The word for cookie, der Keks, is a masculine noun. In this sentence, the cookie is the direct object receiving the action (it is the thing being passed). Therefore, it must be in the accusative case, changing der to den.

Could I use geben (to give) instead of reichen?

Yes, you could say Würden Sie mir bitte den Keks geben? However, reichen specifically means "to pass" or "to hand" something to someone. It is the perfect and most natural verb to use when asking someone to pass food across a table.