Making good use of free relative clauses

IN the preceding chapter, we compared a bound modifier to an animal species that has already arrived at its evolutionary dead-end and a free relative modifier to a species that partakes of a wide gene pool for its further evolution. This was in the context of the power of free relative clauses to expand ideas beyond the limits of the usual subject-verb-predicate format. We saw that while bound relative clauses simply affirm the identity of a subject noun, free relative clauses expand ideas in any way the writer or speaker deems suitable to his exposition.

There's a handy guide for spotting the two — most bound relative clauses that refer to non-persons are introduced by "that," while most free relative clauses that refer to non-persons are introduced by "which": "The sedan that you delivered to me last week is a lousy clunker!" "That sedan, which you told me would be the best my money can buy, is a lousy clunker!" Notice how self-contained and peremptory the first sentence is and how awkward it would be to add any more ideas to it (better to start all over again with a new sentence!).

English Plain and Simple (2234th of a series)