You add the two parts together and nothing changes, so it is: Worrying.
The -ing form is waving.
Tiering
Picning
end ear ing
There is no such word.The word mercy is a noun. Only verbs have an -ing form.
Just and the "ing" to the word "worry" the end result is "worrying"
The -ing form is waving.
Respell
You would spell value with -ing on the end as valuing.When you add -ing to a verb, and that verb has a silent E on the end, you get rid of the E.
Typing
riding
Practicing
eye ehn gee
planning
end ear ing
The correct spelling is "sticking."
centering