... 那个男孩正在游泳 That boy is swimming ; The boy was swimming 他肯定正在游泳 He Must Be Swimming 这只狗正在游泳 The dog is swimming ...
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他肯定正在游泳
He must be swimming
以上为机器翻译结果，长、整句建议使用 人工翻译 。
他肯定正在游泳。
He must be swimming.
youdao
He can't be swimming.
他当时肯定没有正在游泳。
He cant have been swimming.
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