The key to exercise solutions in chapter 8 - Grammar - Past Perfect for the textbook Into Focus B1 with authors Sue Kay, Vaughan Jones, Silvia Minardi e Daniel Brayshaw from Pearson Longman
Question
Read the GRAMMAR FOCUS and answer the questions.
Answer
had + past participle
To show that one past action happened before another past action
He had fallen to the ground and his heart had stopped before the medical people got to him.