from then on/since then From then on they didn't fight each other again.从那以后他们彼此就不再打架了。 He has never given up the study of English since then.从那时起他从来没间断过恐学习。 <辨析>from then on 意为“从那时起”,通常与一般过去时连用,指过去某一时刻之后的任意时间。since then 意为“从那时以来”,通常与现在完成时连用,指过去某一时刻之后的连续时间。