Another predictable verb pattern has spelling changes in forms other than yo: Any verb that ends in ‐uir (except for those that end in ‐guir) adds a y before the normal ending in all forms but nosotros/nosotras and vosotros/vosotras. Table serves as an example for all the verbs in the list that follows.
Influir (to influence) is a good example of a basic verb you know (fluir) and a prefix (in‐).
All the above verbs are conjugated exactly like construir. The verb oír (to hear) is similar, but oír is also a ‐go verb in its yo form, and has an accent on the infinitive and in the nosotros/nosotras and vosotros/vosotras forms. See Table , for example.