theo công thức : S + V-ed ta có:

play = played                                                      

walk = walked                                                         

watch = watched

listen  = listening

wait  =   waited 

check = checked

ask      = asked

want    = wanted

call      =  called

Deliver = Đeliverd

work=worked

warn = warned

wash  = washed

try = tried

turn = turned

Question = Questioned

observe  = observed

need      = needed

live         lived

laugh     = laughed

kill          = killed

kiss         = kissed

Invite      = invited

Công thức : S + V-ed.

Ta có:

1)play - played

2)walk - walked

3) watch - watched

4)listen -  listened

5) wait - waited

6)check - checked

7)ask - asked

8) want - wanted

9) call - called

10)deliver - delivered

11)decide - decided

12 )work - worked 

13)warn - warned

14)wash - washed

15)try - tried

16) turn - turned

17)question - questioned

18) observe - observed

19) need - needed

20) live - lived

21) laugh - laughed 

22) kill - killed

23) kiss - kissed

24) invite - invited