It -- S
will make-- V
them-- DO
wise-- Object Complement
The topic of complements is a broad and complex one, but here is a good basic introduction from an
on-line source:
A complement is used with verbs like be, seem, look etc. Complements
give more information about the subject or, in some structures, about
the object.
There are various definitions of 'complement', which range from the
very general (anything in the predicate except the verb, including the
direct object and adverbs) to the much more restrictive one used here.
A complement is the part of the sentence that gives you more information
about the subject (a subject complement) or the object (an object complement)
of the sentence.
The complement to be used, if any, is dependent on the verb used in the
sentence. Subject complements normally follow certain verbs.
For example:
- He is Spanish.
- She became an engineer.
- That man looks like John.
Object complements follow the direct object of the verb-
For example.
- They painted the house red.
- She called him an idiot!
- I saw her standing there.
The complement often consists of an adjective or noun phrase,
but can also be a participle phrase, as in the last example. It is often
not very clear whether a phrase is a complement or an adverbial.