1- I had learned all the words by 6 o'clock on Sunday.
2- She had left before June, 1.
3- She had written just 2 letters by middday.
4- When we got to the stattion, the train had already left.
5- She had just made coffee when I came.
6- I had a bath and went to bed.
8- She thanked me for that what I had done for her.
9- She knew that I had talked to her father.
10 - Had he finished his work before she arrived?
7 - I hadn't read this book by Saturday yet.