essence of this process has been treated by a number of scholars (e. g. H. Sweet), not as a word-building act, but as a mere functional change. From this point of view the word hand in Hand me that book is not a verb, but a noun used in a verbal syntactical function, that is, hand (me) and hands (in She has small hands) are not two different words but one. Hence, the сазе cannot be treated as one of word-formation for no new word appears.
According to this functional approach, conversion may be regarded as a specific feature of the English categories of parts of speech, which are supposed to be able to break through the rigid borderlines dividing one category from another thus enriching the process of communication not by the creation of new words but through the sheer flexibility of the syntactic structures.
Nowadays this theory finds increasingly fewer supporters, and conversion is universally accepted as one of the major ways of enriching English vocabulary with new words. One of the major arguments for this approach to conversion is the semantic change that regularly accompanies each instance of conversion. Normally, a word changes its syntactic function without any shift in lexical meaning. E. g. both in yellow leaves and in The leaves were turning yellow the adjective denotes colour. Yet, in The leaves yellowed the converted unit no longer denotes colour, but the process of changing colour, so that there is an essential change in meaning.
The change of meaning is even more obvious in such pairs as hand > to hand, face > to face, to go > a go, to make > a make, etc.
The other argument is the regularity and completeness with which converted units develop a paradigm of their new category of part of speech. As soon as it has