Измените в вопросительное предложение we were reading a book yesterday evening задавая вопрос на разные слова, то есть должно получиться около 6 предложений. предложения менять в past perfect continuous!
Had we been reading a book yesterday evening? when had we been reading a book? what had we been reading yesterday evening? who had been reading a book yesterday evening? How long had we been reading a book yesterday?
when had we been reading a book?
what had we been reading yesterday evening?
who had been reading a book yesterday evening?
How long had we been reading a book yesterday?