过去式就是jumped into ，中文意思是跳入跳进……

A patient jumped into a bath being prepared by a member of staff and scalded herself.一位病人跳进了工作人员正在给她准备的洗澡水中把自己烫伤了。

Stuart jumped into the sea and inflated the liferaft.斯图尔特跳进海里给救生筏充气。