Questions & Answers about Я учу русский язык каждый день.
Учу is the 1st person singular, present tense form of the verb учить.
- учить = to learn / to study / to teach (depending on context)
- я учу = I learn / I study or I teach, but here the context makes it I study / I am learning
In this sentence, я учу русский язык clearly means I study Russian (language), not I teach Russian, because the typical way to say I teach Russian is я преподаю русский (язык) or you’d specify to whom you’re teaching. Context usually removes the ambiguity.