• Todd stopped teasing his wife.
    Change of State Verb: Todd had been teasing his wife.
  • Mindy began teasing her husband.
    Change of State Verb: Mindy hadn’t been teasing her husband.

Some further change of state verbs: start; finish; carry on; cease; take (as in X took Y from Z » Y was at/in/with Z); leave; enter; come; go; arrive; etc.