I heard about it in Spanish

When to use it: Use this to introduce information you learned from another person or source.

Enterarse de means finding out about something; de que introduces the information that follows.

Say it: en-teh-REH deh keh

When to use it: Say this when you are wondering whether reported information is true.

Será is the future form of ser used here to express uncertainty, not a definite prediction.

Say it: seh-RAH see-EHR-toh

When to use it: Use this to clearly mark information as uncertain before repeating it.

If the speaker is female, seguro becomes segura; si introduces the uncertain yes-or-no clause.

Say it: noh es-TOY seh-GOO-roh

When to use it: Say this when you want to avoid spreading information you cannot personally confirm.

Me constan means I know something from reliable knowledge or experience; andar diciendo adds a repeated, ongoing feel.

Say it: noh KYEH-roh an-DAR dee-SYEN-doh

When to use it: Use this to direct someone to the person who can confirm the information.

Pregúntale combines the command pregunta with le, meaning ask that person; a names the person afterward.

Say it: meh-HOR preh-GOON-tah-leh ah

When to use it: Say this when new information genuinely surprises you.

Sabía is the imperfect of saber, which presents knowing as an ongoing state in the past.

Say it: ah noh sah-BEE-ah