`5.` didn't use to

`->` "ten years ago" là dấu hiệu thì QKĐ

`->` did + Vo

`6.` would finish

`->` "the next day" nghĩa là "tomorrow" thì TLĐ.

`->` Câu gián tiếp: will + Vo `=>` would + Vo.

`7.` had already taken off

`->` When + `MĐ_1` (QKĐ) `,` `MĐ_2` (QKHT).

`8.` were you doing

`->` When + `MĐ_1` (QKĐ) `,` `MĐ_2` (QKTD).

`9.` didn't watch

`->` S + would rather ('d rather) + sb + V (QKĐ).

`5`.didn't use to

`\rightarrow` `\text{S + didn't use to + V :}` Không từng

`6`.would finish

`\rightarrow` Câu tường thuật : S + said + that + S + V ( lùi thì )

`7`.had already taken off

`\rightarrow` Thì QKHT : S + had + V3 / PII 

`8`.were you doing

`\rightarrow` Thì QKTD ( CNV ) : Were / Was + S + V-ing ?

`9`.didn't watch

`\rightarrow` S + would rather + O + Ved / V2

`\text{@ TheFox}`