Past Perfect

After:  I studied how to use past perfect this morning, but it's really difficult to use fluently. I'd like to write some sentences for practice.  The train had already left when I arrived at the station.  She had already read the original book before watching the movie. I had completed the task before yesterday. I studied how to use past perfect this morning, but it's really difficult to use fluently. I'd like to make some sentences for practice.  The train had already departed when I arrived at the station.  She had read the original book before she watched the movie. I had completed the task before yesterday.