то

pronoun

1. it; the neuter third-person singular pronoun in the nominative case, used as the subject of a verb.

   “Тя взе бебето и го държеше в ръцете си, но то продължаваше да плаче.”

particle

1. used to show the logical result of a particular statement or situation; then, in that case

   “Ако пристигнеш навреме, то ще можеш веднага да се включиш.”

2. Used for emphasis in various statements expressing amazement, indignation, etc. No precise equivalent in English, is often best translated by rephrasing the surrounding sentence.

   “То беше радост, то бяха викове.”