Verb taking a direct object–for example, “Say something. He doubted seguro Que Se Algo = Sure Know Something her story was true. Dudó que su historia fuera cierta. Refers to person, place, thing, quality, etc.
He had doubts about his ability to do his job. He was so full of doubt he didn’t know where to start. Tenía dudas sobre su capacidad para el trabajo. Estaba tan lleno de dudas que no sabía por dónde empezar. The doubt about his job’s future kept them from buying a new car. La incertidumbre sobre su futuro laboral les disuadió de comprar un nuevo auto.
His honesty erased my doubts about his trustworthiness. Su honestidad disipó mis dudas sobre si era digno de confianza. Verb not taking a direct object–for example, “She jokes. I doubt if I can help you. No estoy seguro de poder ayudarte. Report an error or suggest an improvement. Describes a verb, adjective, adverb, or clause–for example, “come quickly,” “very rare,” “happening now,” “fall down.