Translation:They have followed me all day.
What about a sentence with 'whole', like: "they have followed me the whole day"
exactly, I think it should be accepted...
Agreed. That's what I typed.
I typed all day long and it was marked incorrect. Isn't it the same as all day?
It's because you added the word "long" which means the same, but isn't given in the prompt
They have followed me the whole day should also be accepted
My first thought was sinister secret agents. Then I thought of ducklings following someone around and suddenly it was an adorable sentence.
Not even gonna try all day long on DL.
According to google ".. all THE day." should be accepted!?
No, that doesn't sound like proper English.
Google Translate is not a reliable translation service.