13. Ivan has a stomachacke. He (to eat) junk food all day.

Решение:

Для составления предложения в Present Perfect Continuous используем вспомогательный глагол 'have/has' + 'been' + основной глагол в форме V-ing.

1. Ivan has a stomachacke. He has been eating junk food all day.

Ответ: has been eating