Question

Which alternative is correct? Explain the errors, please!

By the time the boss comes back from vacation, the problem will have been sorted out.
By the time the boss comes back from vacation, the problem will be sorting out.
By the time the boss comes back from vacation, the problem will be being sorted out.
By the time the boss comes back from vacation, the problem will be sort out.

Answer 1

A primeira opção.
"Will be being" não é viável.
"Will be sort out" tá no tempo errado.
"Will be sorting" não tem como o will e o ing estarem na mesma frase juntos e terem sentido.