英语翻译

题目

英语翻译
1-they experiment was a success.
2-they experiment had succeeded.
3-they experiment succeeded.
不好意思代词打错了。
1-their experiment was a success....
2-their experiment had succeeded....
3-their experiment succeeded....
补充下，我认为：
第一、三句都用了一般过去时，到底哪个是对的？
第二句是完成时。表述是否正确？

答案

第一个.
表示某事成功,可直接用sth is a success结构,另外,若主语是人的话,就需要后两者的用法,至于具体哪种用法,还需视句子时态而定.