In the study of languages, understanding verb tenses and their applications within different contexts is fundamental to effective communication. The verb 'to be' in English, for instance, is a highly versatile verb, serving not only as a main verb expressing states, but also as an auxiliary verb in various tenses. Consider the following excerpt from a historical novel set in the 19th century: 'In times long past, the issue of women's rights was not as universally recognized as it is today. Women in many societies not only had to struggle to be acknowledged as equals but also often bore the additional burden of being considered property, their voices not heard and their actions overlooked.' Analyzing this passage, discuss the application of the verb 'to be' in highlighting the conditions and perceptions of women during that era. Additionally, reflect on how the verb 'to be' aids in conveying the enduring struggles for equality in different historical periods.