$\text{1. }$had finished

- Cấu trúc: After+ S + had+ V_pp, S+ V_ed/ bqt

$\text{2. }$was going 

- Cấu trúc: When+ S+ V_ed/ bqt, S+ was/were+ Ving

$\text{3. }$has never been (DHNB hiện tại hoàn thành: never)

- Cấu trúc: S+ have/ has+ V_pp

$\text{4. }$had been (DHNB quá khứ hoàn thành: By last month)

- Cấu trúc: S+ had+ V_pp

$\text{5. }$had moved

- Cấu trúc: S+ had + V_pp + before+ S+ V_ed/ bqt

$\text{6. }$has already told (DHNB hiện tại hoàn thành: already)

- Cấu trúc: S+ have/ has+ V_pp

$\text{7. }$had cleaned

- Cấu trúc: After+ S + had+ V_pp, S+ V_ed/ bqt

$\text{8. }$hasn't stayed (DHNB hiện tại hoàn thành: since)

- Cấu trúc: S+ have/ has+ V_pp

$\text{# themoonstarhk}$

Đáp án:

`3`. had finished

`4`. was going

`5`. has never been

`=>` Thì Hiện tại hoàn thành - DHNB `:` never

`6`. had been

`=>` Thì Quá khứ hoàn thành - DHNB `:` By last month

`7`. had moved

`8`. has already told

`=>` Thì Hiện tại hoàn thành - DHNB `:` already

`9`. had cleaned

`10`. hasn't stayed

`=>` Thì Hiện tại hoàn thành - DHNB `:` since last years

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

* Công thức Hiện tại hoàn thành `:`

$(+)$ S + have / has + V3 / PII

$(-)$ S + have / has + not + V3 / PII

$(?)$ Have / Has + S + V3 / PII ?

* Công thức Quá khứ hoàn thành `:`

$(+)$ S + had + V3 / PII

$(-)$ S + had + not + V3 / PII

$(?)$ Had + S + V3 / PII ?

* Công thức Quá khứ tiếp diễn `:`

$(+)$ S + was / were + Ving

$(-)$ S + was / were + not + Ving

$(?)$ Was / Were + S + Ving ?

Những cấu trúc hòa hợp giữa các thì:

`->` After + QKHT + QKĐ

`->` When + QKĐ + QKTD

`->` QKHT + before + QKĐ