13 has done
13 has turned
14 has just started
15 has lost
16 have gone
17 Have you bought
18 worked
19 have you learned
20 have flown
VI
1 studied
2 have studied
3 have never watched
4 watched
5 have traveled
6 traveled
7 have read
8 read
9 had
10 have had
11 have had
12 have lived
13 went
14 stayed
15 haven't seen - hasn't visited
16 have been
17 has worked
18 moved - have been
19 wore
20 have been
21 met
22 has become
23 have felt - lived
24 was - haven't seen
VII
1 They have built this house for 2 months
2 My father hasn't met me since last week
3 Lan has not written to Maryam before
4 The last time I met her was 3 years ago
5 It's four years since we began learning English
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