Final answer:
Many early preachers were trained through small Bible schools, apprenticeships, and denominational Bible colleges and seminaries.
Step-by-step explanation:
During the early years, many of the preachers were trained through small Bible schools where ministers served as volunteer faculty members. These schools provided basic education and training in biblical studies. Additionally, some preachers underwent apprenticeships, where they learned from experienced ministers and gained practical experience through hands-on training. Denominational Bible colleges and seminaries also played a role in training preachers, providing more formal education and theological training.