在英语中，"你必须游泳"可以用"You must swim"来表达。
"Must"是一个助动词，表示"必须"的意思。它源于古英语中的"motan"，意思是"能"、"可以"。在现代英语中，"must"用来表示"必须"、"应该"等意思。
下面是一些例句：
You must swim at least three times a week. (你必须每周至少游泳三次。)
Children under the age of 8 must be accompanied by an adult while swimming. (8岁以下的儿童在游泳时必须有成人陪同。)
Students must pass a swim test before joining the swim team. (学生必须通过游泳测试才能加入游泳队。)
"Must"是一个助动词，表示"必须"的意思。它源于古英语中的"motan"，意思是"能"、"可以"。在现代英语中，"must"用来表示"必须"、"应该"等意思。
下面是一些例句：
You must swim at least three times a week. (你必须每周至少游泳三次。)
Children under the age of 8 must be accompanied by an adult while swimming. (8岁以下的儿童在游泳时必须有成人陪同。)
Students must pass a swim test before joining the swim team. (学生必须通过游泳测试才能加入游泳队。)