Han kanske har redan åkt bort eller

Han kanske har redan åkt bort eller säkerligen åker snart och ska vara borta minst 4 månader.

Resultat (engelska) 1:

He may have already gone away or certainly go soon and will be gone for at least 4 months.

Resultat (engelska) 2:

He might have already gone away, or certainly go soon and will be absent for at least 4 months.

Resultat (engelska) 3:

maybe he's already gone, or certainly will be leaving soon and will be out for at least 4 months.