The phrase 'could be lying in' is correct and can be used in written English.
You could use this phrase when talking about something that is hidden and may be difficult to discover. Example: The truth of what happened that night could be lying in the depths of her memory.
I could be lying in bed all day with no work". Too true.
They fear a third sleeper cell, formed at the same time, could be lying in wait.
So, if a Tambora-scale scenario would be bad news, far worse could be lying in wait.
The Which? investigation found that one possible solution to foiling fraudsters trying to read a card remotely could be lying in the kitchen.
It's hard not to be aware of how vulnerable I am now -- following a strange woman down an unfamiliar hallway and stepping into a room I have never seen, where anyone or anything could be lying in wait.
It's hard not to be aware of how vulnerable I am now — following a strange woman down an unfamiliar hallway and consensually stepping into a room I have never seen, where anyone or thing could be lying in wait.
A "cyber pathogen" could be "lying dormant" in the iPhone at the centre of the legal battle between Apple and the FBI, ready to unleash havoc on the critical infrastructure of San Bernardino county.
In the real world users could be lying on that interactive couch; but in virtual reality they could be floating on an alien ocean produced by a content creator.
But the man, a murderer-rapist serving life in prison, could be lying; or, even if he is not, it might have happened that the others came along after, before or during his attack, investigators say.
This could be lying on the ground on a mat in Savasana - a yoga pose where all you do is lay down on your back with your eyes closed and be.
They fear a third sleeper cell, formed at the same time, could still be lying in wait.
