Taxonomy of meanings for 然後:  

  • THEREUPON
    • PPadS1.postS2and then, afterwards
  • ONLY THEN
    • PPadS1.postS2temporalonly after that time
    • PPadS1.postS2logiconly under these logical conditions
    • PPadS1.postS2general conditionalonly then; only after the preceding condition is fulfilled
  • ONLY
    • PPadV.postN{SUBJ}it is only N that V-sLZ