Odpowiedź:
1. was talking (Present Continuous -» Past Continuous)
2. was annoyed (Present Simple -» Past Simple)
3. couldn’t understand (can -» could)
4. had tried (Past Simple -» Past Perfect)
5. had been switching his.... (Past Continuous -» Past Perfect Continuous)
6. had left a message on his voicemail (Past Simple -» Past Perfect)
7. hadn’t called me (Past Simple -» Past Perfect)
8. hadn’t answered (Present Perfect -» Past Perfect)
9. would send (will -» would)
10. would explained (will -» would)
11. would reply (will -» would)