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I have been very busy the last few days

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I have been very busy the last few days
这句话算什么时态?have been doing是现在完成进行时 have been done 应该是完成时的被动语态 那我上面这句话算什么呢?have been 有什么用法也帮我补充下
I have been very busy the last few days
这句话的一般时是:I’m very busy.变成现在完成时是:I have been very busy. have been是曾经的意思 如: I have been to Beijing.我曾去过北京.