Explicație:
1 present perfect
2 prezent perfect
3present perfect(s a întâmplat un accident, este la prezent ,dacă scria : there was an accident atunci era la trecut)
4 past perfect
5 present perfect
6 past simple
7 present perfect
8 past simple
9 past simple
10present perfect
11past simple
12present perfect
13present perfect
14past simple
15present perfect
16past simple
17present perfect
18past simple
19past simple
20present perfect
21 present perfect
