`1.` We haven't seen Tom since I moved to Bristol.

`2.` She hasn't written to me for nearly 2 years.

`3.` This film hasn't been shown on TV for nearly 10 years.

`-` Bị động HTHT : S + have/has + been + Vpp + ... + (by+O)

`4.` She hasn't swum in the river for 3 years.

`-` CT : S + last + V-ed/c2 + ... + time ago/in time/when + S + V-ed/c2

`=` S + haven't/hasn't + Vpp + ... + for/since time (since + S + V-ed/c2)

Công thức đổi HTHT - QKĐ

S + has/have + not + V3/ed + for/since + time 

--> S + last + V2/ed 

--> The last time + S+ V2/ed + was + time 

--> It is / has been + time + since + S+ (last) + V2/ed 

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1. We haven't seen Tom since I moved to Bristol.

2. She hasn't written to me for nearly 2 years.

3. This film hasn't been shown on TV for nearly 10 years.

4. She hasn't swum in the river for 3 years.

`color{orange}{~MiaMB~}`