How to use "trained" in a sentence

If I read the temper of our people correctly, we now realize, as we have never realized before, our interdependence on each other; that we cannot merely take, but we must give as well; that if we are to go forward, we must move as a trained and loyal army willing to sacrifice for the good of a common discipline, because without such discipline no progress can be made, no leadership becomes effective.

They trained us for it

No one in his right mind would take boys as young as twelve into the deepest parts of the Sierras, no matter how well prepared, supplied, and trained they were, no matter how strong, no matter how many big brothers were there to look out for them."

"That's exactly what I've been trained to do."

"You're trained what to do from the day you start to work here

However, I had become expert at overcoming this fear and had trained myself to speak calmly, no matter what said to me