Within a so-called subordinate clause such as 'he had just engaged' [in 'yesterday, the head of the department dictated a four-page letter to the secretary he had just engaged'], the same functional hierarchy obtains as in the so-called main clause, but we should not speak of a predicate there, but of a ‘predicatoid’, and the functions of elements directly connected with it should be considered at best primary-like.
- Martinet (1962), a pag.50