Geri dönmek zorundayız.
 - We have to turn back.
Geri dönmek zorunda kalacağız.
 - We're going to have to turn back.
Keşke zamanı geri döndürebilsem.
 - I wish I could turn back time.
Geri dönmek zorundayız.
 - We have to turn back.
Geri dönmek zorunda kalacağız.
 - We're going to have to turn back.
Realising he had forgotten his briefcase, he turned back to the office.