Anoche estarían murmurando sobre el complot.
Last night, they were probably muttering about the plot.
Breakdown of Anoche estarían murmurando sobre el complot.
estar
to be (location/state)
sobre
on / about
anoche
last night
murmurar
to mutter
Elon.io is an online learning platform
We have an entire course teaching Spanish (Spain) grammar and vocabulary.