The meaning of the particles in "Yume no naka futari de ita yo ne"


The phrase

> Yume no naka futari de ita yo ne

is translated in a page as

> In my dreams, we were together

I don't understand the meaning of the particles here, plus where the
'together' comes from. _Yume no naka_ is 'inside of my dreams' I suppose,
_futari_ would be 'the two of us' and _ita_ the past of _iru_ which would be
'were' but where is the 'together'? What does the _yo ne_ adds here? And _de_
is supposed to be a particle that indicates the place where an action happens,
but here is after 'the two of us'?




The particle "de" 「で」 doesn't just mark the location where something happens.
It's also used to mark the _means_ by which something happens. Which can
include more direct things like "the tool by which an action was performed"
(e.g. I went to Tokyo _by bullet train_ - _densha de_ Tokyo ni itta) but can
also mark more abstract ideas. So "futari de" 「二人で」 means "by way of the two
of us", or in other words "[do it] together". Since the verb here is just
"ita", it's "we were together".




The particle "de" 「で」 doesn't just mark the location where something happens.
It's also used to mark the _means_ by which something happens. Which can
include more direct things like "the tool by which an action was performed"
(e.g. I went to Tokyo _by bullet train_ - _densha de_ Tokyo ni itta) but can
also mark more abstract ideas. So "futari de" 「二人で」 means "by way of the two
of us", or in other words "[do it] together". Since the verb here is just
"ita", it's "we were together".

