have been casing
-he estado estudiando
Present perfect progressive conjugation of case. There are other translations for this conjugation.

case

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500+ learners.
He could have been casing a target for the robber.
Podría haber estado buscando un objetivo para el ladrón.
I have been casing this place for a couple of weeks now.
He estado cubriendo este lugar por un par de semanas.
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