Most verbs + ing to speak = speaking
Verbs (ww) that end in -e to arrive = arriving
Verbs (ww) that end in -ie to die, to lie = dying, lying
Verbs (ww) that end in consonant, vowel, consonant (cvc)
to skip, to get = skipping, getting
Verbs (ww) that end in -y, -x, -w to buy, to fix, to snow = buying, fixing, snowing