estaban infiltrando
-they/you were infiltrating
Imperfect progressive ellos/ellas/ustedes conjugation of infiltrar.

infiltrar

Popularity
500+ learners.
En julio de 1959, habló por la radio para advertir que los comunistas se estaban infiltrando en el gobierno.
In July 1959, he went on radio to warn that Communists were infiltrating the government.
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