ellos fuesen

were

ˈf w e s e n → ser
verb · third plural · imperfect subjunctive Rare #35,340
were Imperfect subjunctive (ellos/ellas/ustedes). Often used after expressions like "como si", or to talk about hypothetical or uncertain situations in the past.
SP: Era como si fuesen invisibles.
EN: It was as if they were invisible.
Conjugation of ser
Subjunctive imperfect
SingularPlural
First era éramos
Second eras —
Third era eran

Me pesan las piernas como si fuesen de plomo.

My legs feel as heavy as lead.

Como si los malditos pepinillos no fuesen suficientes problema.

As if the damn pickles weren't enough of a problem.

— Good bye, Lenin! (2003)

Hablas de las cosas como si fuesen tuyas.

You talk about things as if they were yours.

Su cuerpo no estaba listo para que sus órganos fuesen valiosos.

His body wasn't ready for his organs to be valuable.

— El hombre sin pasado (2010)

Mis piernas pesan como si fuesen de plomo.

My legs feel as heavy as lead.

Le has pedido a todos que fuesen tus maestros.

You have asked everyone to be your teachers.

— Ip Man (2008)

Es como si todos los bebés de Japón fuesen amigos míos.

It's as if all the babies in Japan were my friends.

— Vivir (1952)