ils brûlaient

were burning, burned, were alight

→ brûler
brûl to burn, to set fire to + aient they imperfect tense
verb · 3rd-person plural, imperfect tense Rare #51,983
were burning, burned
FR: Ils brûlaient les vieux papiers dans le jardin.
EN: They were burning the old papers in the garden.
were burning Used of a physical sensation, meaning to feel a burning pain.
FR: Mes yeux brûlaient à cause de la fumée.
EN: My eyes were burning because of the smoke.
were burning, were alight
FR: Les bougies brûlaient toute la soirée.
EN: The candles were burning all evening.
Conjugation of brûler
Indicative imperfect
SingularPlural
Third brûlait brûlaient

Mes poignets me brûlaient.

My wrists were burning.

Ils brûlaient leurs empreintes, ça puait grave !

They were burning their footprints, it stank badly!

— Fight Club (1999)

Plusieurs bougies brûlaient.

Several candles were burning.