`⇒` Các câu cần được chuyển đổi sang thể phủ định và nghi vấn thuộc thể KHẲNG ĐỊNH: `(+)`.

`1)`

`(-)` The teacher wasn't nice.

`(+)` Was the teacher nice?

`2)` 

`(-)` The students weren't very clever.

`(+)` Were the students very clever?

`3)`

`(-)` One student wasn't in trouble.

`(+)` Was one student in trouble?

`4)`

`(-)` We weren't sorry for him.

`(+)` Were you sorry for him?

`5)`

`(-)` He wasn't nice though.

`(+)` Was he nice though?

`6)` 

`(-)` I wasn't happy.

`(+)` Were you happy?

`7)`

`(-)` You weren't angry.

`(+)` Were you angry?

`8)`

`(-)` She wasn't in London last week.

`(+)` Was she in London last week?

`9)` 

`(-)` He wasn't on holiday.

`(+)` Was he on holiday?

`10)` 

`(-)` It wasn't cold.

`(+)` Was it cold?

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

`⇒` Các câu trên thuộc thì QUÁ KHỨ ĐƠN `(` THE PAST SIMPLE `)`.

`⇒` Công thức thì QUÁ KHỨ ĐƠN với `Tobe`:

   `(+)` `S`  `+`  `Was`/ `Were`  `+` `O`.

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

   `(?)` `Was`/ `Were` `+` `S` `+` `O` ; (Wh-) `+` `was`/ `were` `+` `S` `+``O?`

$#nhatminhbuithien2010$

`1.` `(-)` The teacher wasn't nice.

`(?)` Was the teacher nice?

`2.` `(-)` The students weren't very clever.

`(?)` Were the students very clever?

`3.` `(-)` One student wasn't in trouble.

`(?)` Was one student in trouble?

`4.` `(-)` We weren't sorry for him.

`(?)` Were you sorry for him?

*Khi chuyển sang câu hỏi, các chủ ngữ ở ngôi thứ nhất đều chuyển sang ngôi thứ 2 (I/ We `->` You).

`5.` `(-)` He wasn't nice though.

`(?)` Was he nice though?

`6.` `(-)` I wasn't happy?

`(?)` Were you happy?

`7.` `(-)` You weren't angry.

`(?)` Were you angry?

`8.` `(-)` She wasn't in London last week.

`(?)` Was she in London last week?

`9.` `(-)` He wasn't on holiday.

`(?)` Was he on holiday?

`10.` `(-)` It wasn't cold.

`(?)` Was it cold?

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

`->` Các câu trên đều chia theo thì Quá khứ đơn (theo cấu trúc).

`=>` Cấu trúc thì Quá khứ đơn (với Tobe):

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

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

`(?)` Was/Were + S + C?