"you should call her."
"yeah, i should do."
the speaker in question had what sounded to my north american ears like a "British" accent- i couldn't tell you much more than that other than i don't believe it was rhotic. is this a common construction anywhere ("should do" without any object)? any insight would be appreciated! i tried googling but this is pretty vague to start with and putting "should do" in quotes doesn't help.