A .

`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 

-> Tất cả đều là động từ theo quy tắc -> thêm ed 

B.  

`1`  (+) Yes , I did  

(-) No, I didn't 

`2` (+) Yes , he did 

(-) No, he didn't 

`3` (+)Yes, she did   

(-) No ,she didn't 

`4` (+) Yes , she did 

(-) No , she didn't 

`5` (+) Yes ,  he / she did

(-) No , he / she didn't 

-> Did + S +  V + O 

-> Yes , S + did 

-> No, S + didn't 

@ Dorris