"dudar" can be a verb. You can see the conjugations below.

intransitive verb
1. (desconfiar)
  • dudar de algo/alguien -> to have one's doubts about something/somebody
  • ¿acaso dudas de mí? -> don't you trust me then?
2. (no estar seguro)
  • dudar sobre algo -> to be unsure about something
3. to hesitate (vacilar)
  • dudar entre hacer una cosa u otra -> to be unsure whether to do one thing or another
  • no dudes en venir a preguntarme -> don't hesitate to come and ask me
transitive verb
4. to doubt
  • ¿vas a venir? — lo dudo -> are you going to come? — I doubt it o I don't think so
  • lo dudo mucho -> I very much doubt it
  • yo no lo hice — no lo dudo, pero… -> I didn't do it — I'm sure you didn't, but…
  • dudo que venga -> I doubt (whether) he'll come

dudar [doo-dar']
verb transitive & verb neuter
1. To doubt, to hesitate, to be in suspense; to fluctuate. (n)
  • No dudo de su talento -> I don't question his talent
  • No lo dudo -> I don't doubt it
2. To doubt, to fear. (n)
  • Dudar de algo -> to doubt something

1 (no estar seguro de) to doubt
será verdad, pero yo lo dudo
espero que venga, aunque lo dudo mucho I hope she'll come, although I doubt very much (if) she will; —yo te ayudaré —no lo dudo, pero ... "I'll help you" — "I'm sure you will, but ..."; es lo mejor para ti, no lo dudes it's the best thing for you, believe me
a no dudarlo undoubtedly
dudar que
dudo que sea verdad I doubt (whether o if) it's true
dudan que venga
dudo que yo haya dicho eso I doubt I said that; no dudo que sea capaz de hacerlo I don't doubt that he's capable of doing it
dudar si
dudaba si había echado la carta I wasn't sure if I had posted the letter
dudo si ha echado la carta al correo
2 (vacilar sobre)
lo dudé mucho y al final me decidí por el azul I thought about it o dithered (familiar) a lot but in the end I decided on the blue one; si yo fuera tú, no lo dudaría if I were you, I wouldn't hesitate
1 (desconfiar) to doubt; have doubts
dudar acerca de algo
dudar de algo to question sth; doubt sth
no dudo de su capacidad no dudo de su talento
los celos le hicieron dudar de su cariño jealousy made her question o doubt his affection
no deberías haber dudado de él dudo de su cariño
2 (vacilar)
no sé qué hacer, estoy dudando I don't know what to do, I'm in two minds o I'm undecided; dudamos entre ir en autobús o en taxi we were not sure whether to go by bus or taxi; dudaba entre los dos she couldn't decide between the two
dudar en hacer algo to hesitate to do sth
dudaba en comprarlo he hesitated to buy it; no dudes en llamarme don't hesitate to call me

Verb Conjugations for "dudar" (go to to doubt)


yo dudo dudé dudaba dudaría dudaré
dudas dudaste dudabas dudarías dudarás
él/ella/Ud. duda dudó dudaba dudaría dudará
nosotros dudamos dudamos dudábamos dudaríamos dudaremos
vosotros dudáis dudasteis dudabais dudaríais dudaréis
ellos/ellas/Uds. dudan dudaron dudaban dudarían dudarán
Complete dudar conjugation >
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