<Li> Transition, T--in this section the composer modulates from the key of the first subject to the key of the second . If the first group is in a major key, the second group will usually be in the dominant key . However, if the first group is in minor key, the second group will usually be the relative major . </Li> <Ul> <Li> Second subject group, S--one or more themes in a different key from the first group . The material of the second group is often different in rhythm or mood from that of the first group (frequently, it is more lyrical). </Li> <Li> Codetta, K--the purpose of this is to bring the exposition section to a close with a perfect cadence in the same key as the second group . It is not always used, and some works end the exposition on the second subject group . </Li> </Ul> <Li> Second subject group, S--one or more themes in a different key from the first group . The material of the second group is often different in rhythm or mood from that of the first group (frequently, it is more lyrical). </Li> <Li> Codetta, K--the purpose of this is to bring the exposition section to a close with a perfect cadence in the same key as the second group . It is not always used, and some works end the exposition on the second subject group . </Li>

Exposition of a sonata form form always modulates to a secondary key area