Complex sentence: He tenderly asks her forgiveness, but Tess, in anguish, tells him he has come too late; thinking he would never return, she yielded at last to Alec d'Urberville's persuasion and has become his mistress.
Split into simpler sentences: He tenderly asks her forgiveness, but Tess, in anguish, tells him he has come too late. Thinking he would never return, she has yielded at last to Alec d'Urberville's persuasion and has become his mistress.