She's always been interested in keeping fit.为什么句中要用been

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She's always been interested in keeping fit.为什么句中要用been

She's always been interested in keeping fit.为什么句中要用been
She's always been interested in keeping fit.为什么句中要用been

She's always been interested in keeping fit.为什么句中要用been
be interested in对.感兴趣
整个句子的时态是现在完成时,构成形式:主语+ have / has +动词的过去分词,she's= sha has ,be 的过去分词是been

be interested in 固定搭配
完成时