He can swim in the river, which I cannot.

　　他能在河里游泳，而我不能。

　　He can swim like a fish.

　　他能像魚一樣的游泳。

　　I trust Peter to go to the pool alone because he can swim well.

　　讓彼得一個(gè)人去游泳我放心，因?yàn)樗麜?huì)游。

　　I hear he can swim freestyle, side stroke and breaststroke very well.

　　我聽說(shuō)他自由泳、側(cè)泳和蛙泳都游得非常好。

　　He can swim faster than before.

　　他可以游得比以前快了。