Collocations for speculate - verb
VERB + SPECULATE
can/could only | decline to, refuse to | be fascinating to, be interesting to, be tempting to | be idle to
It is idle to speculate what the consequences would have been.
It is idle to speculate what the consequences would have been.
be difficult to
PREP.
about
There was no point speculating about the possibility of them getting back together.
There was no point speculating about the possibility of them getting back together.
as to
We can only speculate as to this man''s identity.
We can only speculate as to this man''s identity.
on/upon
He refused to speculate on her reasons for leaving.
He refused to speculate on her reasons for leaving.