研究表明英语句式

总体上以现在时为主，但是如果涉及到调查或研究的过程，描述事件，过程等会有过去时描述结果时用一般现在时

一般用一般现在时

Research shows, successful learners of languages have similarities in many various areas.

A study shows that the successful language learners are same at many aspects.

research 调查,研究,这是一个不可数名词,所以不能有复数形式 大量的研究 用 a lot of research,lots of research ,plenty of research 大量的研究表明 a lot of research indicates that

Research shows, successful languages learners have common grounds in many ways.楼上的many various存在重复， similarities翻译不够准确。