目(め)覚(ざ)め()た()ら() mezametaraソファー sofaaに ni寝(ね)て()い()た() neteita。 When I woke up, I was lying on the sofa. Literal Woke-up [when-たら] sofa [on-に] was-sleeping. ~たら here is temporal — 'when I woke up.' ソファー is a loanword. 寝ていた ('was sleeping/lying') uses ~ていた for the state discovered upon waking. Subject omitted throughout. sleep~たら (conditional)~ていた (past progressive/state)subject omission
目(め)覚(ざ)め()た()ら() mezametaraソファー sofaaに ni寝(ね)て()い()た() neteita。 When I woke up, I was lying on the sofa. Literal Woke-up [when-たら] sofa [on-に] was-sleeping. ~たら here is temporal — 'when I woke up.' ソファー is a loanword. 寝ていた ('was sleeping/lying') uses ~ていた for the state discovered upon waking. Subject omitted throughout. sleep~たら (conditional)~ていた (past progressive/state)subject omission