`26` Did you meet , had already gone , arrived

`27` didn't make

`28` had he left , rang

`29` learnt/learned

`30` had served

`-` CT :

Did + S + V-inf +...?

S + did + ( not ) + V-inf

S + V2/V-ed

S + had + V-II

S + would rather + V2/V-ed 

No sooner + had + S + V-II + than + S + V2/V-ed

Câu đk loại 2 : If + S + V-qk , S + would/could/.... + V-inf

$baoyen.$

`26.` Did....meet ?

`-` had already gone , arrived

`DHNB` thì qkđ: last night → (WH...)`+`did`+`S`+`V-bare...?

`@` Thì `QKHT` + before + Thì `QKĐ`

`27.` didn't make

`@` Cấu trúc: S + would rather (‘d rather) + (not) + V

`28.` had left...rang

`@` When + simple past, + past perfect : Diễn tả hành động xảy ra và hoàn tất trước hành động ở mệnh đề when.

`29.` had learned
`@` Câu điều kiện loại `3:` If`+`S`+`had`+`V(pp/ed), S`+`would/could`+`...`+`have`+`V(pp/ed)..→ Giả thiết không có thật trong quá khứ

`30.` had served

`DHNB` thì qkht: before `1975` → S`+`had`+`V(ed,c3)`+`O...

`giahan27511`