`1`. went

`⇒` Vế trước là thì QKĐ

`⇒` Vế sau cũng là thì QKĐ

`2`. broke

`⇒` Vế trước là I'm late

`⇒` Vế sau là thì QKĐ

`3`. had gone... went

`⇒` Cấu trúc: Before + QKĐ, QKHT

`4`. gave ... hadn't read

`⇒` Dấu hiệu: yesterday

`⇒` thì QKĐ

`⇒` Cấu trúc: S + V(QKĐ) + S1 + had (not) + Vpp

`5`. hadn't phoned

`⇒` Cấu trúc: When + QKĐ, QKHT

`6`. came... had left

`⇒` Cấu trúc: After + QKHT, QKĐ

`7`. parked... had drunk

`⇒` Cấu trúc: By the time + QKĐ, QKHT

`8`. had seen

`⇒` Dấu hiệu: before

`⇒` thì QKHT

`9`. recognized.... had seen

`⇒` Cấu trúc: Because + QKHT, QKĐ

`10`. had started

`⇒` Cấu trúc: When + QKĐ, QKHT.