她中文说得很好，她肯定在中国生活过。
She speaks Chinese very well — she must have lived in China.
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must英 /mʌst/|美 /mʌst/
lived英 /lɪvd/|美 /lɪvd/|英 /laɪvd/|美 /laɪvd/
解释
must + have + 过去分词 lived，从语言能力证据反推过去的生活经历。
She speaks Chinese very well — she must have lived in China.
must + have + 过去分词 lived，从语言能力证据反推过去的生活经历。