`1` do `=>` did

`2` teach `=>` taught

`3` send `=>` sent

`4` spend `=>` spent

`5` begin `=>` began

`6` cut `=>` cut

`7` put `=>`put

`8` give `=>` gave

`9` write `=>` wrote

`10` be `=>` was/were

`11` buy `=>` bought

`12` have `=>` had

`13` take `=>` took

`14` go `=>` went

`15` make `=>` made

`16` think `=>` thought

`17` see `=>` saw

`18` eat `=>` ate

`19` sing `=>` sang

`20` wear `=>` wore

`+` Quá khứ đơn

`(+)` S + $Ved/V2$

`(-)` S + $didn't + V$

`(?)` $Did + S$ +V ?

$@H$

IV. Give the correct form of the verbs in the past tense.

1 : did : làm

2 : taught : dạy

3 : sent : gửi

4 : spent ; dành 

5 : began : bắt đầu

6 : cut : cắt

7 : put  : đặt

8  :  gave : cho

9 : wrote : viết

10 :  was /were

11 : bought : mua

12 : had : có

13 : took  : lấy

14 : went : đi

15  : made : làm

16 : thought : nghĩ

17 : saw :nhìn

18 : ate : ăn

19 : sang : hát

20 : wore : mặc

`=>` áp dụng S + Ved/ V bất quy tắc