I have surely heard, &c. Figure of speech Prolepsis.
hast chastised. didst chastise.
was chastised. I have been chastised.
turn Thou me. cause Thou me to return.
Related Commentaries of Jeremiah 31:18
Jeremiah 31:18
18 I have surely heard Ephraim bemoaning himself thus; Thou hast chastised me, and I was chastised, as a bullock unaccustomed to the yoke: turn thou me, and I shall be turned; for thou art the LORD my God.