Time illustrations

1. general references
2. time situation
   • present
   • past
   • future
3. aspects of development
   • simultaneity
   • antecedence
   • posteriority
   • punctuality
   • anticipation
   • delay
   • start
   • end
   • continuation
   • repetition
   • duration, course
   • frequency
   • change
   • permanence
   • singularity