This is the 3589th most frequent Spanish word.
leyendo
"Reading" (present participle of "leer").
In this sentence, 'leyendo' is used in the present progressive form, indicating an ongoing action at the moment.
Estoy leyendo un libro en este momento.
I am reading a book right now.
Here, 'leyendo' is part of the past progressive tense, showing an action that was ongoing in the past.
Ella estaba leyendo bajo la luz de la lámpara.
She was reading under the lamp light.
This sentence uses 'leyendo' as a present participle, describing the action performed by the girl as observed by the speaker.