我觉得这个问题是问,如果一个人丢了演讲稿会发生什么?(man 后面的loses是第三人称单数)
you can say
A man named sb is going to have a speech today,when he arrives into the lecture room ,he suddenly rember that he forget to bring the speech.he is pretty nervous,好烦呀,哈哈就这样接着写了~