How to use the 'ing' sound
How 'ing' makes a difference
The 'ing' spelling pattern is a suffix because it is always attached to the end of a word. Normally it just gets stuck at the end of a verb, which is a doing word (as if you didn't know that), so that the verb sounds like it is actually being done (also known as the present tense).
Spelling rules are so annoying
Aaaarrrggghhh, 'ing' you're killing me.
Sometimes though we have to do more than just add 'ing' to a verb to spell our new word correctly. For example,