Expressiones Used with the Indicative
Pensar queTo think that Saber queTo know that Creer queTo believe that No dudar queTo not doubt that No hay duda de queThere is no doubt that No negar queTo not deny that Es verdad queIt is true that Es cierto queIt is certain/true that Es seguro queIt is sure/certain that Estar seguro de queTo be sure that Es obvio queIt is obvious that Observar queTo observe that
The Indicative In general, the Indicative mood is used to refer to what is real and certain. It is used to talk about actions, events, or states that are believed to be facts or true. It is very typical in speech for making factual statements or describing obvious qualities of a person or situation.