PCDVD數位科技討論區 - 瀏覽單個文章

Have been = 形容存在於現在之前的事情
Had been = 形容存在於過去某段時間之前的事情

I have been speaking English for many years.

I had been speaking Chinese before I speak English.

引用:

作者yctsai88

舉個例子，大家看看對不對

I had been to Japan before I went to America last year.

^^ 這個是正確的