Добавить ко всем словам окончание -ed
Refer,look,travel,laugh,close, love,dance,phone,live,study,pray,cry,tidy,enjoy,try,carry,stop,rod,call,miss

Referred
Looked
Traveled
Laughed
Closed
Loved
Danced
Phoned
Lived
Studied
Prayed
Tidied
Enjoyed
Tried
Carried
Stoped
Rodded (?)
Called
Missed

Refered, looked, traveled, laughed, closed, loved, danced, phoned, lived, studied, prayed, cried, tidied, enjoyed, tried, carried, stoped, roded, called, missed