a. Positive
I had eaten breakfast before I left for work.
He had studied Spanish for two years before traveling to Spain.
They had already booked the hotel room before they arrived at the destination.
The movie had started before we got to the theater.
She had cooked dinner when her friends arrived.
By the time we got to the beach, the sun had set.
The train had left the station before we got there.
He had completed his project before the deadline.
They had cleaned the house before the guests arrived.
She had practiced piano for several hours before the concert.
Baca Juga: 30 Contoh Kalimat Past Perfect Tense: Positif, Negatif, dan Tanya