`28)` had been `-` started

`-` QKHT: diễn ra trước và kéo dài đến thời điểm 

`-` QKĐ: Dùng để mô tả một hành động đã hoàn thành tại một thời điểm xác định trong quá khứ.

`29)` left `-` had bought - needed

`-` S + V(QKĐ) + as soon as + QKHT + V + ( O)

`30)` Were having `-` Were running

`-` QKTD: Diễn tả hành động xảy ra song song với nhau

`( + )` S + was/were + V-ing

`31)` Turned `-` went

`32)` Was doing `-` broke

`@` When + S + QKTD + O, S + QKĐ + O

`33)` was playing `-` was doing

`34)` Burned `-` Arrived

`@` Notes:

`-` Cấu trúc QKHT

`( + )` S + had + Ved/ Cột `2`

`( - )` S had not + Ved/ Cột `2`

`( ? )` Had + S + Ved/Cột `2`?

`-` Cấu trúc QKĐ:

`( + )` S + Ved/ Cột `2`

`( - )` S + did not + V

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

`#Ph`

`28.`

DHNB: for an hour `->` QKHT

$\text{Form:}$

`+)` S + had + V(PII) + adv/O

`+)` when + S + V(ed/PII) + adv/O

be `=>` had been

start `=>` started

`29.`

$\text{Form:}$

`+)` S + V(QKĐ)+ as soon as + S + V(QKĐ/QKHT) + adv/O

leave `=>` left

buy `=>` bought

need `=>` needed

`30.`

$\text{Form:}$

`+)` While + S + was/were + V-ing + adv/O, S + was/were + V-ing + adv/O

have `=>` were having

run `=>` were running

`31.`

$\text{Form:}$

`+)` S + V(ed/PII) + adv/O

turn `=>` turned

go `=>` went

`32.`

$\text{Form:}$

`+)` When + S + V(QKĐ) + adv/O, S + was/were + V-ing + adv/O

do `=>` did

break `=>` was breaking

`33.`

$\text{Form:}$

`+)` While + S + was/were + V-ing + adv/O, S + was/were + V-ing + adv/O

play `=>` was playing

do `=>` was doing

`34.`

$\text{Form:}$

`+)` S + V(ed/PII) + adv/O

burn `=>` burned

arrive `=>` arrived