As a verb, "age" would be used as in !to age a wine". The verb is "envejecer" or "madurar". The conjugations would be a little tricky, but I imagine follow the norm for verb ending in "cer" as in conocer. envejezco, envejeces, envejece, envejemos, envejemen

Present tense:
-o/-as/-a/-amos/-ais/-an

To smell is "sentir" in French. Conjugations in link.

The verb in Spanish for "to go" is "ir". It is an EXTREMELY irregular verb, and most of the conjugations look noting like the base verb.