Question

Stop-stopping-stopped
Train-
Plan-
Look-
Fax-
Phone-
Offer -
Travel-
Allow-
Change-

Answer 1

train - training -trained
plan - planning - planned
look - looking - looked
fax - faxing - faxed
phone -phoning - phoned
offer - offering - offered
travel - traveling - traveled
allow - allowing - allowed
change - changing - changed