investigation is a field study, some consideration must now be given to the nature of such studies. While studies in comparative linguistics have been carried out, and are still being conducted, in the present century, many studies in linguistics are now moving in a different direction compared with those of the previous century, for the themes of such present-day research may be summed up in the keywords ‘synchronic’ and ‘structural’. Tracing the historical development of a language over an extended
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