Verbs which don't change: :Some verbs don't change when the tense changes.Here are some verbs which are alike:
1.hurt/hurt/hurt. 2.set/set/set 3.put/put/put 4.quit/quit/quit 5.let/let/let.
6.shut/shut/shut 7.shed/shed/shed 8.spread/spread/spread 9.cut/cut/cut 10.hit/hit/hit.
Some people say "This pen costed ten rupees". The correct way is "This pen cost ten rupees".Mary hitted the dog. (Incorrect) Mary hit the dog (Correct)
Please put the bag on the table. Mary put the bag on the table. Mary has put the bag on the table.
Please don't hit the child. Mary hit her naughty child when it broke the window pane.
Fat people need to shed the extra flesh> Mary shed some weight last month.
Mary looks smart . She has shed a few pounds of fat.