Put these sentences in the question and negative forms.

1. You had studied English before you entered the University.
2. They had arrived at the station by 6 o’clock.
3. James had finished reading the book by last Sunday.
4. I had done my lessons by the time you called me up.
5. The teacher had given the students their homework before the bell rang.
(упражнение на Past Perfect Tense)

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