estuvieron viendo
-they/you were seeing
Pretérito progresivo para el sujetoellos/ellas/ustedesdel verbover.

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Se estuvieron viendo pero quedó en la nada por él.
They were seeing each other but nothing came of it.
Hay unas 20 o 30 personas que me estuvieron viendo toda la noche.
There were 20 or 30 people who would have seen me all night.
¿Se estuvieron viendo mucho tiempo?
Had they been seeing each other a long time?
Durante 20 años lo estuvieron viendo venir.
For 20 years, you've seen it coming.
Amelia y Pablo nos cuentan que estuvieron viendo a este cuclillo alimentarse durante un largo rato.
Amelia and Pablo tell us that they were watching this Dark-billed Cuckoo feed for a long time.
No lo estuvieron viendo anoche.
And not last night.
Palabra del día
la capa