Page:Adapting and Writing Language Lessons.pdf/288

Rh 2. Most of them lack a simple English equivalent. A root plus one extension may be translated quite differently from the same root with another extension.

3. Unlike the prefixes, some of the extensions vary markedly in their form.

78/ Nevertheless, extensions are in some ways of as much potential Value to a student as the prefixes are. Familiarity with them will do more than anything else (except possibly a knowledge of Arabic) to increase vocabulary, paticularly in reading and oral comprehension.

79/ A verb stem may contain no extensions, or one, or more than one. Some of the most common are the passive, 80/ the causative, 81/ the applicative, 82/ and the reciprocal.