Past Perfect Tense

He said he ... (to look) everywhere for the book.

Helen ... (to leave) by the time we arrived.

The police reported that they finally ...(to capture) the thief.

 I met them before I ... (to go) a hundred yards.

I saw that we ... (to take) the wrong road.

He knew that he ... (to make) a serious mistake.

 I felt that I ...  (to meet) the man somewhere before.

He asked me why I ... (to leave) the party so early .

He wanted to know what ... (to happen) to his briefcase.

Previously he ... (to be) a very good student.