2. Complete the sentences with the Past Perfect form of the verbs in brackets.
1 He .. (to watch) this TV programme before his parents came home.
2 Sheila and Witty .. (to send) the invitations for the conference before Friday.
3 A group of tourists. (already to visit) this cathedral before the guide told them about its history.
4 His nephew... (to move) to a new flat by the beginning of September.
5 The accident ... (to happen) before Henry understood anything.
6 John and Andrew.. (to get) to the hotel before night.
