one saw, you could see
Man sah noch lange den Rauch und die Asche.
The smoke and ash could be seen for a long time afterward.
— Iwans Kindheit (1962)
Man sah seinem Gesicht an, dass er gelangweilt war.
You could see from his face that he was bored.
Man sah ihm an, dass er wütend war.
You could see that he was angry.
Man sah schon, dass Tom nicht mit dem Herzen dabei war.
You could already tell that Tom wasn’t really into it.
Man sah Tom an, dass er log.
You could tell from Tom that he was lying.