Doubling Rule
big + er
bigger
slide + ing
sliding
copy + ing
copying
jump + ing
jumping
cute +er
cuter
hurry + ed
hurried
hop + ed
hopped
smile + ed
smiled
tasty + er
tastier
quit + ing
quitting
slip + ing
slipping
invite + ing
inviting
copy + er
copier
help + ed
helped
begin + ing
beginning
include + ed
included
annoy + ing
annoying