Penjelasan:

"I had been living in the city for five years before I decided to move to the countryside." (Saya telah tinggal di kota selama lima tahun sebelum saya memutuskan untuk pindah ke pedesaan.)

"She had been studying for her exams for weeks before she finally felt prepared." (Dia telah belajar untuk ujiannya selama beberapa minggu sebelum dia akhirnya merasa siap.)

"We had been working on the project for hours before we realized it was getting late." (Kami telah bekerja pada proyek itu selama beberapa jam sebelum kami sadari sudah malam.)

"He had been playing the piano for over an hour when I arrived at the concert." (Dia telah bermain piano selama lebih dari satu jam saat saya tiba di konser.)

"I had been waiting for the bus for half an hour after it was supposed to arrive." (Saya telah menunggu bus selama setengah jam setelah seharusnya sudah tiba.)