Задание

Complete the sentences by transforming the verbs in brackets in the Past Perfect Continuous. Use full forms of the verbs.

Write three or four words in each gap.

How long (Mark / to hike) by the time he was 21?

Jane (to sleep) for half an hour when her father came home.

Sue and Sophie were not very tired. Unlike Jennifer, they (not / to walk) long.

They (to try) to win the contest for three years before they finally succeeded.