1. My mother spent 3 hours making a dress.

⇒ It took my mother 3 hours to make a dress

*(It take ... to V)

2. It’s nearly 20 years since my father saw my uncle.

⇒ My father hasn't seen my uncle for nearly 20 years.

*(Công thức: S + have/has + (not) + Vp2)

Study well!

`1`. It took my mother 3 hours to make a dress.

`->` S + takes/took + SO + thời gian + to V 

`=` S + spend/spent + thời gian + Ving

`2`. My father hasn't seen my uncle for nearly 20 years.

`->` It + is + thời gian + since + S + ( last ) + V2/ed

`=` S + have/has + not + Vpp + for + khoảng thời gian