Answer the following questions. Your answers should be clear and short.Enumerate the major modes of modern vocabulary development.
(1)CREATION REFERS TO THE FORMATION OF NEW WORDS BY USING THE EXISTING MATERIALS, NAMELY ROOTS, AFFIXES AND OTHER ELEMENTS；(2)SEMANTIC CHANGE MEANS AN OLD FORM WHICH TAKES ON A NEW MEANING TO MEET THE NEW NEED. THIS DOES NOT INCREASE THE NUMBER OF WORD FORMS BUT CREATE MANY MORE NEW USAGES OF THE WORDS, THUS ENRICHING THE VOCABULARY. (3)BORROWING HAS PLAYED A VITAL ROLE IN THE DEVELOPMENT OF VOCABULARY, PARTICULARLY IN EARLIER TIMES.
