$\text{1. took (Last week ⇒ Thì QKĐ ⇒ take → took)}$

$\text{2. arrived ............ weren't (Cấu trúc When + QKĐ, QKĐ)}$

$\text{3. said .......... bought (Câu gián tiếp)}$

$\text{4. taught (Last summer ⇒ Thì QKĐ)}$

$\text{5. started ........... was (QKĐ + when + QKĐ)}$

$\text{6. donated (Thì QKĐ ⇒ donate → donated)}$

$\text{7. rang ......... invited (yesterday ⇒ Thì QKĐ dùng cho cả 2 vế của câu)}$

$\text{8. did .... watch (last night ⇒ Thì QKĐ)}$

$\text{9. was ......... used to (When + QKĐ, QKĐ)}$

$\text{10. Did you go (yesterday ⇒ Thì QKĐ)}$

$\text{11. wasn't .......... didn't feel (Thì QKĐ)}$

$\text{12. spent (Thì QKĐ⇒ spend → spent)}$

$\text{13. wrote ........ didn't write (Thì QKĐ ⇒ write → wrote)}$

$\text{14. Were they (Thì QKĐ chủ ngữ they ⇒ were)}$

$\text{15. saw (Yesterday ⇒ Thì QKĐ)}$

$\text{Cấu trúc thì QKĐ}$

$\text{(+) S + V(ed/c2) + ....................}$

$\text{(-) S + didn't + V(nguyên thể) + ............}$

$\text{(?) Did + S + V(nguyên thể).......?}$

`1.` took

`=>` Last week là dấu hiệu của thì QKĐ.

`2.` arrived/wasn't be

`3.` said/will buy

`4.` taught

`=>` Last summer là dấu hiệu của thì QKĐ.

`5.` started/was

`=>` Có when nên ta lùi về 1 thì.

`6.` donated

`7.` rang/ivited

`=>` Yesterday là dấu hiệu của thì QKĐ. 

`8.` did you watch

`=>` Last night là dấu hiệu của thì QKĐ.

`9.` was/used to

`10.` Did you go

`11.` didn't be/wasn't feel

`12. spent

`13.` wrote/didn't write

`14.` Are they are

`15.` saw

$@Mon$