had been experimenting

Past perfect progressiveconjugation ofexperiment.There are other translations for this conjugation.

experiment

Confirmation that Daniel had been experimenting on himself, experimenting on Theresa Spencer (confirmed girlfriend), and the experimentation has caused these memory problems and Theresa's vegetative state.	Se confirma que Daniel experimentó consigo mismo, con Theresa Spencer (confirmada como su novia), y que los experimentos les provocaron problemas de memoria y el estado vegetativo de Theresa.
Like Flemming, earlier scientists had been experimenting with dyes.	Como Flemming, científicos anteriores habían experimentado con colorantes.
Riedo and Beni Hauri (the band's roadie) had been experimenting with oscillators, noise generators, ring modulators and other devices since 1969.	Riedo y Beni Hauri (el roadie de la banda) habían estado experimentando con osciladores, generadores de ruido y otros artefactos, desde 1969.
Throughout his years as a student he had been experimenting with growing various strains, including two separate strains known as Bubba and Kush.	Durante sus años de estudiante estuvo experimentando con el cultivo de distintas cepas, incluyendo dos conocidas como Bubba y Kush.
In the past, the Fortnite team had been experimenting with a number of PvP modes, but ultimately decided to move its focus to the PvE experience.	En el pasado, el equipo de Fortnite había estado experimentando con varios modos PvP, pero finalmente decidió cambiar su enfoque a la experiencia PvE.
Other administration officials were quoted in The New York Times as saying that Cuba had been experimenting with anthrax and other deadly pathogens that they declined to identify.	Otros oficiales de la Administración citados por el New York Times expresaron que Cuba había estado experimentando con anthrax y otros patógenos de carácter letal que declinaron identificar cuáles.
As early as the mid-17th century, scientists had been experimenting with glass tubes filled with what was known then as rarefied air.	Desde mediados del siglo XVII, científicos han experimentado con tubos de vidrio rellenos, científicos han estado experimentando con tubos de vidrio llenados con lo que conocíamos como aire enrarecido.
It included interventions from younger facilitators who had been experimenting with Quiet Time and the four standards of absolute honesty, purity, unselfishness and love, advocated by IofC, since the last School for Changemakers.	Este incluyó intervenciones de jóvenes facilitadores que, desde la última escuela de Agentes de Cambio, han estado experimentando con momentos de silencio y los cuatro valores de honestidad, pureza, desprendimiento y amor absolutos, promovidos por Iniciativas de Cambio.
The US had been experimenting with the exploitation of shale gas for a while, but large scale exploration and exploitation only began with the run-up to the 2008 crisis, when high oil and gas prices had made investments interesting.	Los EE.UU. experimentan ya hace mucho con la explotación de gas de esquisto, pero la exploración y explotación a gran escala se dio hacia el comienzo de la crisis del 2008, cuando los precios del gas y la energía hicieron interesante las inversiones.