Spelling of Verb + ING

For many verbs we make the ING form by simply adding -ING to end of the verb.

eat - eating

speak - speaking

Verbs ending with -e (with the exception of verbs ending in -ee and -ie)

Drop the -e and add ING

hope - hoping

ride - riding

Verbs ending with -ee

Just add -ING

agree - agreeing

flee - fleeing

Verbs ending with -ie

Change the -ie to -y and add -ING

die - dying

tie - tying

lie - lying

Verbs ending with one vowel and one consonant (with the exception of w, x, and y)

For one syllable verbs

double the consonant and add -ING

jog - jogging

sit - sitting

run - running

stop - stopping

http://cerquella.com/bilingual/deploy/Unit4/grammar_1.html