Your sentence
Estaba+durmiendo+cuando+llegaste.
Words in this sentence
estar
to be (have a temporary or permanent location in space); to be present; to be (denotes a copula, in a transient fashion); to be (auxiliary verb for the progressive/continuous aspect, preceding the gerund of the verb); to be in a state (in a passive voice sense); to be, stay (denotes a copula, in a transient fashion); to be (still); to be in a long-term state (in specific idioms)
Verb
dormir
to sleep; to fall asleep; to sleep in; to die; to rest in death; to put to sleep (someone or something); to anesthetize; to euthanize, to put down (mainly for pets but also people)
Verb
llegar
to arrive, get (to); to get up to, to go up to, to reach (+ a or + hasta); to be sufficient; to be enough; to manage (be successful)
Verb