es malo - It's bad
es mejor - It's better
es peor - It's worse
es horrible - It's horrible
es horrendo - It's horrendous
es estupendo - It's stupendous
es maravilloso - It's marvelous
es posible - It's possible
es imposible - It's impossible
es probable - It's probable
es improbable - It's improbable
es increíble - It's incredible
es necesario - It's necessary
es preciso - It's necessary
es urgente - It's urgent
es importante - It's important
es interesante - It's interesting
es notable - It's notable
es raro - It's unusual/strange
es extraño - It's strange
es estúpido - It's stupid
es ridículo - It's ridiculous
es curioso - It's curious
es dudoso - It's doubtful
es difícil - It's unlikely
es fácil - It's likely
no es seguro - It's uncertain
no es cierto - It's uncertain
no es verdad - It's not true