claim有声称的意思在里面,have done是完成时,表示动作已经完成,所以claim to have done“声称做过了什么事情”是可以的.
say表示说,讲,一般后面要跟说话的内容的话,用say that从句
为什么claim to have done可以,而say to have done不可以?
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