Rex Marlowe estaba sentado al final del autobús escolar, mirando por la ventana.
Rex Marlowe was sitting at the back of the school bus, looking out the window.
Grammar: "Estaba sentado" uses the imperfect tense of "estar" + past participle to describe an ongoing state in the past, and "mirando" is a gerund showing a simultaneous action (he was sitting and looking).
Ana estaba parada en la puerta, esperando a su amiga.
Luis estaba acostado en el sofá, leyendo un libro.
