have been trainedA passive expression meaning someone has received training, often with มา emphasizing that the training happened previously and has led up to the present. It can be followed by ให้ to indicate what someone was trained to do.
TH: พนักงานใหม่ถูกฝึกมาให้ดูแลลูกค้า
EN: The new employees have been trained to take care of customers.