he had swum across.
他已经游
了。
词)he had swum across.
他已经游了。
Stepped is a weak form; swam and swum are strong.
Stepped 是按规则变化的形式，swam 和 swum 是不按规则变化的形式。
He has swum the English Channel three times.
他已三次游英
利海峡。
He’s a fashion designer who’s always swum against the stream; his work is very original.
他是位总是反潮流的时装设计师,他的作品很独特。
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