Complex sentence: The Greek New Testament is the original form of the books that make up the New Testament as they appeared in Koine Greek, the standard spoken and written language during the events of Jesus' ministry, used by the New Testament writers to testify of Jesus.
Split into simpler sentences: The Greek New Testament is the original form of the books that make up the New Testament as they appeared in Koine Greek, the standard spoken and written language during the events of Jesus' ministry. Greek used by the New Testament writers to testify of Jesus.