Two present perfects

[rajeshmalladi]

I 'have seen' the second sentence in a grammar book and am wondering why the author used present perfect when the accident 'has already' taken place.

Please advice me whether the above sentence is correct in which I used two present perfect tenses.

Thank you,
Rajesh

[Rusty]

I 'have seen' the second sentence in a grammar book and am wondering why the author used present perfect when the accident 'has already' taken place.

Please advice me whether the above sentence is correct in which I used two present perfect tenses. (No. It should be "had already taken place").