他仔细读完了所有文件，早已掌握了案件的全部细节。
He read all the documents carefully and had already mastered every detail of the case.
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had英 /hæd/|美 /hæd/
already英 /ɔːlˈredi/|美 /ɔlˈrɛdi/
mastered英 /ˈmɑːstəd/|美 /ˈmæstərd/
解释
and 后省略主语，过去完成时 (had) (already) (mastered) 带副词 already 强调在阅读完成前就已掌握。
He read all the documents carefully and had already mastered every detail of the case.
and 后省略主语，过去完成时 (had) (already) (mastered) 带副词 already 强调在阅读完成前就已掌握。