1, Derivational affixes can be prefixes or suffixes.

2, Derivational affixes are added to an existing form to create a word.

3, Derivational affix modifies the word lexically which can be divided into prefix, infix and suffix.

4, The existing form to which a derivational affix can be added is called a stem.

5, Verbs in the rGyalrong language(Tibeto-Burman family, northwestern Sichuan)undergo abundant derivational processes via prefixal morphology, with an essential role to play in the grammar.

6, It studies the internal structure of words and the rules that govern their formation. The morphology is generally divided into two fields: inflectional morphology and derivational morphology.

7, For example , it is not success in the fundamental and derivational function of liver and kidney.

8, The morphological relation between & quot ; sing & quot ; and & quot ; singer & quot ; and & quot ; song & quot; is derivational.