他爷爷不会游泳 His grandfather could not swim ; His grandfather not swimming
他认为我不会游泳 He thinks I can't swim
他不会游泳
He can't swim.
以上为机器翻译结果，长、整句建议使用 人工翻译 。
原来他不会游泳，我只好去叫救生员。
He couldn't swim, so I had to call the lifeguard.
youdao
他大叫他不会游泳。
He shouted that he couldn't swim.
但他的朋友说他不会游泳，正打算学。
Friends said he could not swim, but was planning to learn.
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