Translation:He put flowers on his sister's grave.
"lade" is correct, but a bit archaic and literary. In spoken Swedish, we almost always shorten it to "la" if we're not trying to sound like a book.
I want to add that it sounds a bit literary or archaic in speech, but it’s the normal written form. ”La” also exists in writing, but is more colloquial.
Yes, and this "la" that is the same as "lade" is pronounced with the long a like in "far". There is another "la" meaning "väl" (The väl that doesn't mean well, but is used as a question tag. If väl is used in a context where is means well, it cannot be replaced by la) in some dialects which is pronounced with a short a like in "saft" (or the English "fun").
ENatanael, this is interesting. Can you give an example with the other 'la'? I imagine it is strongly dialectal.
Yes, it is as far as I know only used in Västergötland and in and around Göteborg. Here are some examples: "Du är la här imorgon?" "Det är la inte så svårt att fixa?" "Du är la go eller?" (very stereotypical göteborgska)