Word Formation -able, -ness; -ful / -less, -ly, -al

суффиксы -able, -ness

    V + -able = Adj    (respect - respectable)

 Adj + -ness = N       (polite - politeness)

 суффиксы -full/-less, -ly, al

    N + -full / -less = Adj           (use - useful - useless)

 Adj + -ly = Adv (наречие)       (polite - politely)

    N + -al = Adj                       (use - useful - useless)

                               

   -able, -ness

  -ful / -less, -ly, -al