Grammar 3 * Put the verbs in brackets in the past perfect or the past perfect continuous. 1 They had been (walk) in the forest for hours before they realised they were lost. 2 Peter was upset because he (see) a horrible car crash. 3 How long (Aron/climb) before the accident happened? 4 Ann felt cold because she (forget) to take her coat. 5 Tom (wait) for two hours when the rescue helicopter finally arrived.