(d) As for, as far as ... is concerned, as regards ..., all may be translated en cuanto a or por lo que toca a. Otherwise, as far as is translated hasta.
As for him, he said that he had had them also.
En cuanto a él, dijo que las había tenido también.—JUAN VALERA.
"As for me," said old Peter, "I know it by heart."
Por lo que me toca a mí,—dijo el tío Perico,—lo sé de memoria.
—FERNÁN CABALLERO.
(e) When as introduces a clause the action of which is represented as occurring simultaneously with the action of the principal clause, it is translated a medida que.
The children drew their grandmother toward them as they spoke.
Los niños tiraron a su abuela hacia sí a medida que hablaban.
—FERNÁN CABALLERO.