Não consegui entender o significado ou a função de past, no trecho a seguir:
'That's the security alarm,' said Anna, quickly putting down the coffe. 'Somebody must be stealing something!'
We looked at each other. 'The necklace!' we said together.
We both ran from the room, past the pirate display in the next room. Then we hurried down the stairs to the old part of the museum.