`Ex3:`

`1.` went

`2.` cleaned

`3.` Did the dog eat

`4.` didn't talk

`5.` Did you have

`6.` didn't speak

`7.` spoke

`8.` didn't take

`9.` talked

`10.` didn't drive

`11.` Did your brother leave

`12.` left

`13.` laughed

`14.` met

`15.` Did Dana study

`-------------`

$\text{*Structure: Past Simple:}$ (thì Quá khứ đơn)

`-` Đối với đt thường:

$\text{(+) S + Ved/V2 + ...}$

$\text{(-) S + did not + -bare + ...}$

$\text{(?) Did + S + V-bare + ...?}$

`-` Đối với đt tobe

$\text{+) S + was/were + ...}$

$\text{(-) S + was/were not + ...}$

$\text{(?) Was/were + + ...?}$

`-` Ngôi thứ `1;3` số ít: I/he/she/it/tên riêng/ danh từ số ít`->` tobe là was

`-` Ngôi thứ `1;2;3 số nhiều`: you/we/they/danh từ số nhiều `->` tobe là were

`-` `DHNB:` yesterday, ago, last night, last Sunday/Monday/Tuesday/...

Giải thích chi tiết:

`1.` went

`2.` cleaned

`3.` Did the dog eat

`4.` didn't talk

`5.` Did you have

`6.` didn't speak

`7.` spoke

`8.` didn't take

`9.` talked

`10.` didn't drive

`11.` Did your brother leave

`12.` left

`13.` laughed

`14.` met

`15.` Did Dana study

`->` Cấu trúc: Thì Qúa khứ đơn:

`*`  Với V thường:

`(+)` S + V(ed/past) + ..

`(-)` S + did + not + V(nguyên thể)

`(?)` Did + S + V(nguyên thể) ?

`*` Với V "TOBE"

`(+)` S + was/were + ...

`(-)` S + was/were + not + ....

`(?)` Was/were + S + ... ?

(Chú ý: was (số ít: I, He, She, It) were (số nhiều: We, You, They))