$#Tabby ·ω·$

$\text{1.}$ There used to be many beautiful rivers in my hometown.

→ Cấu trúc "used to": S + used to + be + N .... : đã từng 

$\text{2.}$ The last time l went to Paris was three years

→ S + Ved / V2 + was + time + ago 

$\text{3.}$ Ann last wrote to me a month ago 

→ S + last + Ved / V2 + time + ago 

$\text{4.}$ One of my teeth was taken by the dentist three days ago.

Câu bị động thì quá khứ đơn:

→ S+was/were+P2/ed+(by O)

$\text{5.}$ The students spent two hours correcting their exercises.

→ It took the students two hours to correct their exercises.

→ Cấu trúc: S + spend/spent + thời gian + Ving 

→ It + takes/took + so + thời gian + to V