didn't know what to say
I didn't know what to say.
Como no sabía qué decir, me quedé callado.
Since I didn’t know what to say, I stayed quiet.
He didn't know what to say.
Tom no sabía qué decir.
Tom didn't know what to say.
Ken no sabía qué decir a continuación.
Ken didn't know what to say next.
Como no sabía qué decir, se quedó callado.
Since he didn't know what to say, he remained silent.
No dije nada, porque no sabía qué decir.
I didn't say anything because I didn't know what to say.
Como él no sabía qué decir, se quedó callado.
Since he didn't know what to say, he stayed silent.
Como estaba tan contenta, al principio no sabía qué decir.
Because I was so happy, at first I didn't know what to say.
Como ella estaba tan contenta, al principio no sabía qué decir.
Because she was so happy, at first she didn't know what to say.