Chomsky famously pointed out that
- the shooting of the hunters
is an ambiguous phrase. It can mean either that some (unspecified, but definite in context) hunters did some shooting, or that those hunters were shot (by someone unspecified and unmentioned). That's a big difference in meaning, especially to the hunters.
The reason it can be ambiguous is that shooting is not a verb in this phrase; since it's modified by the, it's a noun, but a noun that's formed from the verb to shoot. These are called Nominalizations in syntax; this is the opposite of Verbing Nouns, as Calvin calls it.
The two senses of the shooting of the hunters come from two different senses of shoot. It can be intransitive or transitive:
- Those hunters didn't shoot very often. (intransitive: no direct object)
- Those hunters didn't shoot any ducks. (transitive: direct object ducks)
When an intransitive sentence is nominalized, the noun phrase that is its subject can appear with it, in an of phrase. Passives (like The hunters were shot) are automatically intransitive, because the direct object has taken the place of the subject. So passives are subject to this rule:
- The hunters were shot. ==> The shooting of the hunters.
The by phrase agent of the passive (say, by the KGB) can appear also, and normally would follow the of subject (to be precise, absolutive) phrase.
- the [shooting [of the hunters]] [by the KGB]
But ... the of phrase, a modifier and argument of the nominalized verb, is subject to the optional rule Extraposition from NP, which simply exchanges the order of the two PPs. That's all, folks.