在英语中，表示“他不会游泳”可以使用以下表达方式：
He can't swim.（他不会游泳。）
He is not a good swimmer.（他不是一个擅长游泳的人。）
He is not proficient at swimming.（他不熟练游泳。）
He does not know how to swim.（他不会游泳。）
举个例子：
Example 1: "I tried to teach John how to swim, but he just can't seem to get the hang of it. He can't swim."（我尝试教约翰游泳，但是他似乎就是学不会。他不会游泳。）
Example 2: "Sue is a really good swimmer. She's been on the school swim team for years. John, on the other hand, is not a good swimmer. He avoids the pool whenever possible."（苏是一个很会游泳的人。她已经参加学校游泳队好几年了。另一方面，约翰不是一个会游泳的人。他尽量避免游泳池。）
Example 3: "We're going on a beach vacation next week, but I'm a pttle worried about Peter. He's not proficient at swimming and I don't want him to get into any trouble in the water."（我们下周要去海滩度假，但是我有一点担心彼得。他不熟练游泳，我不想让他在水里遇到任何麻烦。）
Example 4: "We were at the pool and I noticed that pttle Timmy didn't know how to swim. I offered to give him some lessons, but his mom said she was going to enroll him in swim class instead."（我们在游泳池，我注意到小蒂米不会游泳。我提出给他上几节课，但是他妈妈说她要把他报名参加游泳课。）
He can't swim.（他不会游泳。）
He is not a good swimmer.（他不是一个擅长游泳的人。）
He is not proficient at swimming.（他不熟练游泳。）
He does not know how to swim.（他不会游泳。）
举个例子：
Example 1: "I tried to teach John how to swim, but he just can't seem to get the hang of it. He can't swim."（我尝试教约翰游泳，但是他似乎就是学不会。他不会游泳。）
Example 2: "Sue is a really good swimmer. She's been on the school swim team for years. John, on the other hand, is not a good swimmer. He avoids the pool whenever possible."（苏是一个很会游泳的人。她已经参加学校游泳队好几年了。另一方面，约翰不是一个会游泳的人。他尽量避免游泳池。）
Example 3: "We're going on a beach vacation next week, but I'm a pttle worried about Peter. He's not proficient at swimming and I don't want him to get into any trouble in the water."（我们下周要去海滩度假，但是我有一点担心彼得。他不熟练游泳，我不想让他在水里遇到任何麻烦。）
Example 4: "We were at the pool and I noticed that pttle Timmy didn't know how to swim. I offered to give him some lessons, but his mom said she was going to enroll him in swim class instead."（我们在游泳池，我注意到小蒂米不会游泳。我提出给他上几节课，但是他妈妈说她要把他报名参加游泳课。）