英语翻译child need to show a performance that with parents for e

英语原文可以,语法上通,但是不太符合表达方式.另外need要加s的,因为这里不是情态动词.如果你想翻得好点的话可以这样：
Children are going to show a performance with their parents for everyone else.
Child最好改复数,或者要前面加冠词,the 或者 a,the最好.that引到从句了,这句话是短句,加了从句反而显得不好看,去掉that.别的就没什么了
另：你的中文翻译是对的

参考我的翻译吧
Children should give a performance together with their parents.
你的英语原句有问题啊，明显不地道。不过这样的英语你中文翻译的倒是不错啊

原句应该为：
Children should give a performance along with their parents.
孩子需要和家长一起表演一个节目。
这样没问题~~~~~~

We show a child needs to perform the program with their parents