... varied meaningcategories, for example adverbials of time-when, of duration, of frequency, of place, of manner, of means, of instrument, of degree, of purpose. In many cases, these categories can ... friend of mine. A/an is also used (for example, after be)52 A GLOSSARY OF ENGLISH GRAMMAR 792 02 pages 001-138 31/3/06 13:34 Page 52ContentsUse of special symbols viIntroduction 1Glossary of English ... in modern English of the case system of nouns,prevalent in Old English, and also in classical Greek, Latin andmany modern European languages. The of- phrase (sometimescalled the of- genitive’)...