The word 'takeover' is given in Oxford. Can we use 'taken over' as per tense requirement. For example :
Compaq is taken over by HP.
Thanks Bhaisahab. I understand from your reply that taken over can also be used as per tense requirement.
You have corrected sentence by using have been (present perfect). In my opinion the sentence " Compaq is taken over by HP" was also correct in
passive voice of present indefinite.