`1`, `-)`  He didn't send a letter to his penpal last week.

`?)` Did he send a letter to his penpal last week ?

`2`, `-)` She didn't teach us English last year .

`?)` Did she teach us English last year ?

`3`, `-)` They didn't do their homework carefully.

`?)` Did they do their homework carefully ?

`4`, `-)` The Robinsons didn't buy a lot of souvenirs.

`?)` Did the Robinsons buy a lot of souvenirs ?

`5`, `-)` Tourist didn't eat seafood at that famous restaurant.

`?)` Did tourist eat seafood at that famous restaurant ?

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

Áp dụng cấu trúc phủ định và nghi vấn TQKĐ ( do câu khẳng định chia TQKĐ) :

`+)` S + Ved/V2

`-)` S + didn't + V

`?)` Did +S +V ?

`-` DHNB TQKĐ : last + time, yesterday, in + năm quá khứ, once upon a time ,...

`1. ( - )` He didn't send a letter to his pen pal last week.

`( ? )` Did he send a letter to his pen pal last week? 

`2. ( - )` She didn't teach us English last year.

`( ? )` Did she teach you English last year?

`3. ( - )` They didn't do their homework carefully.

`( ? )` Did they do their homework carefully?

`4. ( - )` The Robinsons didn't buy a lot of souvenirs.

`( ? )` Did The Robinsons buy a lot of souvenirs?

`5. ( - )` Tourist didn't eat seafood at that famous restaurant.

`( ? )` Did tourist eat seafood at that famous restaurant? 

`-` Với V thường

`( + )` S + V-ed/V2 + O

`( - )` S + didn't + V-inf + O

`( ? )` Did + S + V-inf + O?

`-` Với tobe:

`( + )` S (số ít + I, he,she,it) + was+ N/adj/... + O

S (số nhiều + you, we, they) + were + N/adj/... + O

`( - )` S (số ít + I, he, she, it) + wasn't + N/adj/... + O

S (số nhiều + you, we, they) + weren't + N/adj/... + O

`( ? )` Was+ S (số ít + I, he, she, it) + N/adj/... + O?

Were + S (số nhiều + you, we, they) + N/adj/... + O?