Era una niña muy alegre, pero, desde la muerte de su madre, se ha vuelto triste e introvertida.She was a very happy child, but since her mother's death, she's become gloomy and introverted.
Mi trabajo era interesante, pero, ahora que lo hace todo la computadora, se ha vuelto aburrido y monótono.My work was interesting, but, now that the computer does everything, it's become boring and monotonous.
Me pregunto por qué se ha vuelto tan susceptible. Usted solía estar mucho más abierto a las críticas.I wonder why you've become so sensitive. You used to be much more open to criticism.