carry的过去式和过去分词是什么

　　He has carried out extensive research into renewable energy sources.

　　他已经对再生能源进行了广泛研究。

　　The research was carried out on a modest scale.

　　这个研究项目开展的规模不算太大。

　　The experiments were carried out under simulated examination conditions.

　　试验是在模拟的情况下进行的。

　　Carry on the good work!

　　干得不错，继续努力吧！

　　She ignored him and carried on with her work.

　　她没理他，继续干她的活。