Several verbs in English have two past participles: one for use in a perfect tense, the other for use as an adjective. This is one of them. Many ships have sunk ; there are many sunken ships .
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AnonymousThe ship ------ ? a) sank b) has sunk c)had sunk d)had sunkenAll are correct except d).
Anonymouswe use the past tense "sank" if the time is given,but without time specific we have to use present perfect.This is not correct.