pron.whosoever所有格，无论是谁的
Whosever book is overdue will be fined.
不管谁的书过期未还都要被罚款.
You may vote whosever side you like.
你可以投票选你喜欢的任一方.
This car is comfortable to ride , whosever it is.
不管这部车子是谁的,坐起来很舒服.
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