yo no puedo decir si tú

I can't tell if you

→ yo
phrase Rare #48,032
I can't tell if you This phrase is usually followed by a clause describing something the listener may or may not be doing or feeling. In natural English, “I can't tell if you...” is more common than the literal “I can't say if you...”
SP: Yo no puedo decir si tú estás diciendo la verdad.
EN: I can't tell if you're telling the truth.

Yo no puedo decir si tú eres serio.

I can't tell if you're serious.

Yo no puedo decir si tú estás bromeando.

I can't tell if you're joking.

Yo no puedo decir si tú eres serio o no.

I can't tell whether you're serious or not.

Yo no puedo decir si tú estás bromeando o no.

I can't tell whether you're joking or not.