Questions & Answers about Pagamos por ello ayer.
Spanish often drops subject pronouns because the verb ending already shows who the subject is.
- Pagamos = we pay or we paid
- So nosotros is not necessary
You could say Nosotros pagamos por ello ayer, but that would usually add emphasis, contrast, or clarity. In neutral speech, just Pagamos... is normal.
In Spanish from Spain, the present perfect (hemos pagado) is very common for recent past actions connected to today.
But with a finished time expression like ayer, Spanish from Spain normally uses the preterite:
- Ayer pagamos... = natural
- Ayer hemos pagado... = generally not standard in most of Spain
So pagamos is exactly what you would expect here.