"우리들이 개미를 먹습니까?"
Translation:Do we eat ants?
To say "can we eat ants?" You'd have to use ~ㄹ 수 있다. It would look like this:
우리들이 개미를 먹을 수 있습니까?
I you say "can we eat ants?" in the sense of "are we allowed to eat ants" you would use ~ㅓ/ㅏ/여도 되다. It would look like this:
우리들이 개미를 먹어도 됩니까?
There's a really good explanation about this grammar on TTMIK here:
If you want to know how do Ants taste, here is a link but green-ant-marmalade is quiet expensive: http://www.bushfoodshop.com.au/green-ant-marmalade/