to change one's opinion or attitude
cambiar la opinión o actitud de uno mismo (cambiar la opinion o actitud de uno mismo)
"After hearing the good news, he decided to change his tune."
"Después de escuchar las buenas noticias, decidió cambiar su tono." (Despues de escuchar las buenas noticias, decidio **cambiar su tono**.)
crazy or extremely worried
unfortunate or unlucky situation
someone who has similar interests or feelings
to keep an activity or process going
to suddenly realize the solution to a problem
to do something uncertain, trusting that it will succeed