If the verb ends with e, we drop the e and add "ing".
make making
bake baking
If the verb ends with ie, we drop the ie and add "y" + "ing".
lie lying
tie tying
If the verb has only one syllable and it ends with consonant + vowel + consonant,
and the last consonant is not w, x, y,
we double the last consonant and add "ing".
(vowel = a, e, i, o, u)
stop stopping
run running
fix fixing
Practice
Add "ing" according to the rules.
Results
We add "ing" to most of the verbs.
work working
cook cooking
If the verb ends with e, we drop the e and add "ing".
make making
bake baking
If the verb ends with ie, we drop the ie and add "y" + "ing".
lie lying
tie tying
If the verb has only one syllable and it ends with consonant + vowel + consonant,
and the last consonant is not w, x, y,
we double the last consonant and add "ing".
(vowel = a, e, i, o, u)
working 
working