What do you do when a verb doesn't fit into one of the tenses? ''I can sleep on the chair'', for example. Do you use the verb for sleep like it is found in the dictionary, or do you use the verbal adjective, or what?
Those examples refer a subject and a verbal noun - (I can write Irish), but I'm not sure where the subject is in "I can sleep on the chair".
Codladh is the Verbal Noun form of codail, so would Is féidir liom codladh ar an gcathaoir be the right construction?
A quick internet search turns up exactly 7 examples of this construction, which might mean that it's an easy mistake to make, or that the prhrase just doesn't come up that often!