[S] Sé que…
I know that…
[C] Creo que…
I think that…
[O] Oigo que…
I hear that…
[P] Pienso que…
I think that…
[E] Es obvio que…
It’s obvious that…
[E] Es verdad que…
It is true that…
[L] Leí que…
I read that…
[O] Oí que…
I heard that…
[P] Parece que…
It seems that…
[E] Es cierto que…
It is true that…