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2. the students have leaved
3. the exams have finished
4. Danny has broke his leg
5. I have send you an email
6. she has seen this film before
7. Dave and Joe have won a scholarship
8. there have been an accident
Ex 3
2. the students haven’t leaved
3. the exams haven’t finished
4. Danny hasn’t broke his leg
5. I haven’t send an email
6. she hasn’t seen this film before
7. Dave and Joe haven’t won a scholarship
8. there haven’t been an accident