1.那位老人摔倒了,男孩子们跑了.2.一旦你决定要做这件事,你就要把它做好.用英语怎么说?

jim leave here alone and has not returned.
再问： 这里不是过去是吗，leave后面应该加ed吧？
再答： 哦哦，对
再问： 上面还有两道题呢？？？
再答： 1.that old man fall down, and the boys are run away. 2.if you are sure you want to this things, just try your best.