`1` went `-` had finished

`-` QKĐ after QKHT. Hành động diễn ra trước dùng QKHT. Hành động diễn ra sau QKĐ.

`->` QKĐ: S + V2/ed

`->` QKHT: S + had + V3/ed

`2` had already seen

`-` HTHT, dấu hiệu: already

`-` Tường thuật: S + said + (that) + S + V(lùi thì)

`-` HTHT `->` QKHT

`->` S + had + V3/ed

`3` hadn't phoned

`-` When QKĐ, S + realized that + QKHT. Hành động diễn ra trước dùng QKHT. Hành động diễn ra sau QKĐ.

`->` QKĐ: S + V2/ed

`->` QKHT: S + had + V3/ed

`4` hadn't eaten

`-` HTHT, dấu hiệu: before

`-` Tường thuật: S + told + O + (that) + S + V(lùi thì)

`-` HTHT `->` QKHT

`->` S + hadn't + V3/ed

`5` had already begun

`-` When QKĐ, QKHT. Hành động diễn ra trước dùng QKHT. Hành động diễn ra sau QKĐ.

`->` QKHT: S + had + V3/ed

`6` watched `-` had done

`-` Before QKĐ, QKHT. Hành động diễn ra trước dùng QKHT. Hành động diễn ra sau QKĐ.

`->` QKĐ: S + V2/ed

`->` QKHT: S + had + V3/ed 

Công thức thì QKHT

(+) S + had + V3/ed 

(-) S + had + not + V3/ed 

(?) Had + S+ V3/ed?

Công thức thì QKĐ (V: to be)

(+) S + was/were + ... 

(-) S + was/were + not ... 

(?) Was/Were + S ... ? 

S số ít, I, he, she, it + was

S số nhiều, you, we ,they + were

Công thức thì QKĐ (V: thường)

(+) S + V2/ed 

(-) S + didn't + V1 

(?) Did + S+ V1?

DHNB: ago, last (year, month ...), yesterday, in + năm QK, ...

-------------------------------------------------

1. went / had finished 

QKD + after + QKHT 

2. had already seen 

S + said + that + S+ V (lùi thì)

HTHT --> QKHT 

DHNB: already (HTHT)

3. hadn't phoned 

When + QKĐ, QKHT 

4. hadn't eaten 

S + told + O + that + S+ V (lùi thì)

DHNB: before (HTHT)

HTHT --> QKHT 

5. had already begin 

DHNB: already (QKHT)

6. watched / had done 

Before + QKĐ, QKHT

`color{orange}{~MiaMB~}`