1  Hoa wishes I had gone to the airport to say goodbye to her friend.

 Câu ước không có thật ở quá khứ: Wish + QKHT

2 He still has not retired despite his age.

3 I got lost even though I knew the area well.

4 I have no intention of telling them what we are going to do.

   I don't have any intention of telling them what we are going to do.

5 Bell has devoted all his time to doing research.

1. Hoa wishes she had gone to the airport to say goodbye to her friend.

- Ước ở quá khứ: S+ wish (chia)+ S+ had + PII.

2. He still has not retired despite his age.

- retire: nghỉ hưu 

3. I got lost even though I knew the area well.

- Despite Ving= Even though+ clause

4. I have no intention of telling you my plans.

- have intention of Ving: định làm gì 

5. Bell has devoted all his time to doing research.

- devote time to Ving: cống hiến thời gian làm việc gì