surely

used for saying that you are certain about something

seguramente, ciertamente

Collocations surely possible · surely true

• Surely you can't be serious.

  Seguramente no estás en serio.

used for suggesting something politely or gently

seguramente, tal vez

Collocations surely worth trying · surely better

• Surely you should tell him the truth.

  Seguramente deberías decirle la verdad.

used for asking if something is true or possible, especially when you do not expect it to be true or possible

¿realmente?, ¿de veras?

Collocations surely must have happened · surely can't be

• Surely he didn't say that.

  ¿Realmente dijo eso?

used for showing surprise or shock when something unexpected happens

¡realmente!, ¡de veras!

Collocations surely not · surely must be

• Surely, you can't mean that!

  ¡Realmente no puedes decir eso!