[…] we may think of an idiom rule for an idiom with a verbal head as a rule adding the string αVγ to the phrase marker of each terminal string αβγ, where β is the idiom, now understanding a phrase marker to be a set of strings. As a matter of execution, we might assume that the idiom rule assigns special features to the verb which, at the LF level, will determine the meaning of the idiom.
- Chomsky (1993), a pag.146