The letters ing are added to verbs to show the present tense. Here is a sample sentence: I am writing a letter. Below are three basic rules that demonstrate how to add the ing ending to most verbs. Study the rules and then complete the practice exercises.
Rule 1: add ing to most words
mail + ing = mailing carry + ing =carrying
always keep the y before adding the ing ending
Rule 2: if the word ends in e, drop the e and add ing
ride + ing = riding take + ing = taking
Rule 3: if the word is short and ends with a vowel/consonant, double the consonant and add ing
stop + ing = stopping
wrap + ing = wrapping
Special:
if a word has a double e, do not drop the second e
See + ing = seeing
change ie to y before adding ing
die + ing = dying
note: the word die means to pass away and the word dye means to color
dye + ing = dyeing
This page http://literacy.kent.edu/Oasis/ndakota/spelling/Lesson4.html
