1. He hasn't planed since 1989.
The last time S + V quá khứ + was ....
-> S + hasn't/ haven't + V PP.2 + since ( vd : 2018)/ for ( vd: 2 months)
2. Miss Harrison was given a gold watch by the company when she left.
Cái này là chuyển về bị động nha , S+ to be ( was/were vì là Simple Past) + PP.2 + by sb + Ob
3. Dimetrio lives far from school, but we don't.
Cái này là đổi lại thôi mà :((( near opposite là far
Dimetrio doesn't -> We + don't