

Viết lại câu sau:
I had a feeling that I was walking in the air.
=> I felt as though I was walking in the air.
Giải thích giúp mình tại sao lại dùng was walking mà không dùng had walked
I had a feeling that I was walking in the air.
=> I felt as though I was walking in the air.
Giải thích giúp mình tại sao lại dùng was walking mà không dùng had walked