英语在床上跳怎么说

To "jump on the bed" in English means to playfully bounce or hop on a bed, often as a form of playful exercise or recreation. Here's an example sentence: "The kids loved to jump on the bed and play games while their parents watched TV."
Note that "jump" can also be used as a verb to describe the act of leaping or bounding through the air, as in: "She jumped off the diving board and into the pool." In this case, "jump" might not necessarily be used to describe an activity on a bed, but rather a more general act of movement or activity.