VI.

1.Đáp án: went

$\rightarrow$ dấu hiệu nhận biết:Last Monday

2.Đáp án: cleaned

$\rightarrow$ dấu hiệu nhận biết:Last Sunday

3.Đáp án: collected

$\rightarrow$ diễn tả 1 hành động đã xảy ra trong quá khứ

4.Đáp án: Did you provide

$\rightarrow$ dấu hiệu nhận biết:Last summer

5.Đáp án: donated

$\rightarrow$ dấu hiệu nhận biết:Last year

6.Đáp án: didn't have

$\rightarrow$ dấu hiệu nhận biết:yesterday

7.Đáp án: saw 

$\rightarrow$ dấu hiệu nhận biết:last month

8.Đáp án:cleaned

$\rightarrow$ dấu hiệu nhận biết:Last Sunday

9.Đáp án: didn't start

$\rightarrow$ dấu hiệu nhận biết:in 2010

10.Đáp án: sang

$\rightarrow$ dấu hiệu nhận biết:vế trước chia ở quá khứ đơn

VII.

1.giải thích:

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

( ? ) Did + S+V+O?

$\rightarrow$

( - ) Children didn't plant more trees.

( ? ) Did children plant more trees?

2.giải thích:

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

( ? ) Was/were+S+O?

$\rightarrow$

( - ) Tom wasn't a member of the Youth Club.

( ? ) Was Tom a member of the Youth Club?

3.giải thích:

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

( ? ) Was/were + S+O?

$\rightarrow$

( - ) The school wasn't closed due to the snow.

( ? ) Was the school closed due to the snow?

4.giải thích:

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

( ? ) Did+S+V+O?

$\rightarrow$

( - ) The organisation didn't provide shelter for the children.

( ? ) Did the organisation provide shelter for the children?

`VI.`
`1.`  went 
`2.` cleaned 
`3.` collected
`4.` Did `-`  provide
`5.` donated 
`6.` did not have
`7.`  saw 

`-` see ~ saw ~ seen : nhìn, xem.
`8.`  cleaned 
`9.` did not start 
`10.` sang

`-` sing ~ sang ~ sung : hát

`VII.`

`1. (-)` Children did not plant more trees.
`(?)` Did children plant more trees?
`2. (-)` Tom was not a member of the Youth Club.
`(?)` Was Tom a member of the Youth Club?
`3. (-)` The school was not closed due to the snow.
`(?)` Was the school closed due to the snow?
`4. (-)` The organization did not provide shelter for the children.
`(?)` Did the organization provide shelter for the children?

`_______________________________________`

`***` Công thức thì quá khứ đơn

Động từ thường : 

`(+)`  S + V_ED + O

`(-)`  S + Did + Not + V + O

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

Tobe : 

`(+)` S + WAS/WERE + O

`(-)` S + WAS/WERE + NOT + O

`(?)`  WAS/WERE + S + O ?

Dấu hiệu nhận biết : yesterday , last night , last week , last month