Verb conjugation is the central part of the sentence in most languages.
Verb conjugation is the creation of derived forms of a verb from its principal parts by inflection. Principal parts is sometimes the infinitive like “cantar” in Spanish, but it can also be verb theme like “skriva – skriver – skrev -skrivit” in Swedish.
In Spanish it’s enough to know the infinitive of a verb to get all the conjugated forms; in the case of regular verbs all the conjugated forms are formed with the same set of endings. Unfortunately there is a big amount of irregular verbs that don’t follow the regular verb conjugation patters.
As shown in the example above, in Swedish verb conjugation there’s a verb theme consisting of four verb forms. All Swedish verb forms are formed by applying the same set of endings to the theme. The theme itself must be memorized, because it contains information about irregularities, if any.