1.Katie 's party not start yet

2. Suzy went to the dentist already

3. Billy met Ted already

4. Claire didn't pick up Lucy yet

5. Mum took Lewis to the park before

6. Penny didn't buy a present for Judy yet

7. Gary saw Din already

8. William went to the zoo before

1, Katie's party hasn't started yet

2, Suzy has already gone to the dentist

3, Billy has already met Ted

4, Clare hasn't picked up Lucy yet

5, Mum has taken Lewis to the zoo before

6, Oenny hasn't bought a present for judy yet

7, Gary has already seen Fin 

8, William has gone to the zoo before

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Thì HTHT: S+have/has+Vpp+...