ВЫ-
Perfective verbs with the prefix вы- are stressed on this prefix in all forms, including participles and nouns related to these verbs (eg, выбор 'choice' ~ выбрать 'to choose').
вот вырастет из тебя тупица you'll grow into a dim-wit
я выучил таблицу умножения I learned the multiplication table
вот если б тебя с места вызвали if you'd been called to answer from your seat
если тебя старостой выбрали just because you were chosen class leader