which verbs in these sentence should be present perfect cont ? correct the errors in verb tense usage.

@Answers:

- They are playing => They have played
- He talked => He has talked
- I try => I have tried

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1.They have been playing for almost 2 hours.(baris 1)
2.he has been falling on the phone for more than half an hour.(baris 3)
3.I have been trying study for the last hour.(baris 5)