Relative clauses (2)
Participle clauses
We can often reduce a defining clause so that it begins with a present participle (-ing), past participle (-ed), or to-infinitive.
-ing clauses correspond to defining relative clauses with an active verb, and -ed clauses correspond to defining relative clauses with an passive verb.
Verbs which are not normally used in continuous forms may be used in reduced relative -ing clauses. e.g. ...contains..., not ...is containing...
However, we can say: ...cointaining...
Other verbs like this include belong to, comprise, consist of, constitute, equal, own, possess, resemble, result from, surround.
It is not always possible to use a reduced form of a relative clause.
We can’t use a reduced form when the first verb in the relative clause is a modal verb. e.g. A technique that might be used in...
We can’t use an -ing reduced form when we talk about a single, completed action. e.g. The chef preparing the food today... (=the chef who is preparing the food today...)
Reduced relative clauses can also be used instead of non-defining relative clauses, particularly in written english. These are usually written between commas(,) or dashes (-).
To-infinitive clauses
We often use a to-infinitive clause instead of a relative clause after:
a superlative + noun (phrase)
the first/second, etc. + noun (phrase)
the only/the next/the last/another/one + noun (phrase)
Often we can use an active or passive to-infinitive clause with little difference in meaning.
Adjective phrases
Adjectives and adjective phrases can be used after nouns with a meaning similar to a relative clause. Often the adjective is followed by a to-infinitive or preposition, or used with an adverb.
A few adjectives (e.g. affected, available, present) can be used alone after a noun with a meaning similar to a relative clause.
Prepositional phrases
We can give additional information about a thing or person using a prepositional phrase. Often these have a meaning similar to a relative clause.















