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.
That's not proper grammar. In such a case you are determining value. Not value "ing".
Practicing
end ear ing
planning
centering
Picning
It is simply 'gossiping'.
It's bullying.
The correct spelling is "gossiping".
Chase+ing is spelled chasing. You drop the 'e' and add '-ing'. The cat was chasing his tail.
There is no such word.The word mercy is a noun. Only verbs have an -ing form.
The correct spelling is "sticking."