grammar.clauses.noun-clauses
Que-clauses as objects: creo que, dijo que
Que introduces 'that' clauses and is never dropped: creo que tienes razón, dijo que venía. Mood depends on the main verb (assertion vs trigger).
grammarB1v0.1.0
Explication
English drops 'that'; Spanish never drops que: sé que es tarde. Assertion verbs (saber, creer, decir, ver) take the indicative; volition/emotion/doubt verbs take the subjunctive — the trigger rules decide.
Watch dequeísmo (adding de where none belongs: *pienso de que) and queísmo (dropping a required de: *me di cuenta que). The verb dictates: pensar que, but darse cuenta de que.
Exemples
Sé que el trámite es lento.
I know the procedure is slow.
I know the procedure is slow.
Région: global
Me dijo que llegaba el jueves.
She told me she was arriving Thursday.
She told me she was arriving Thursday.
Région: global