Taxonomy of meanings for 可以:  

  • APPROPRIATE
    • VPt+V[0]may (thus 以之) appropriately V; be (thus 以之) acceptable to V
    • VPt0+V[0]impersonalIt is (thus 以之) acceptable (for anyone) to V; It is appropriate (for anyone) to VCH
  • PERMIT
    • VPt+V[0]be permitted to
  • INTEND
    • PROBABLE
      • VPt+V[0]may (thus 以之) come (thus 以之) toV; can come to V
    • SHOULD
      • VPt[0]+V[0]one should not
      • VPt+V[0]typically negatede.g. 不可以 "should (thus 以之) not, should never, must never": should should never
      • VPt[0]+Sit is inadmissible that S
    • ABLE
      • VPt+V[0]be (thus 以之) in an objective position to, have the (circumstantially determined) possibility to