Studies - в Present simple. Инфинитив: Study
am not drinking - в Present continuous(negative-отрицание). Инфинитив: drink
sleeps - в Present simple. Инфинитив: sleep
doesn't work - в Present simple(negative-отрицание). Инфинитив: work
Do you go - в Present simple(question-вопрос). Инфинитив: go