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★claim
① vt. &vi.（对……）提出要求，认领，索取
有人认领这个孩子吗？
Has anyone claimed the child?
Did you claim on the insurance after your car accident?
你的车子出事之后，要求领保险金了吗？
I claimed the coat that the teacher found.
我认领了老师找到的外套。
② vt. 声称，断言
claim to have done
They claim to have seen monsters in the sea.
claim that
He claimed that Tom had stolen his wallet.他声称汤姆偷了他的钱包。
He claimed that he had done the work without help.他声称没有得到帮助而完成了这项工作。
Fishermen and sailors sometimes claim to have seen monsters in the sea.
to have seen是不定式的完成式结构。
不定式的完成式用于不定式的动作发生在谓语动作之前的情况。
不定式的完成式常用于believe，declare，find，say，see，know，think，understand等动词之后
I’m sorry to have taken up so much of your time.
I’m glad to have met your family.
He is thought/believed to have been killed in an air crash.
I meant/intended to have invited him, but I forgot to do so.
I hope/plan to have finished by 12.
