The Tense Comparison Theory in Bosnian Grammar is an essential aspect of understanding the verb system in the language. Bosnian verbs have three major tenses: present, past, and future. Each tense can be further classified into simple and compound forms.

The present tense indicates actions happening in the present time and includes simple present and present continuous. The simple past tense describes completed actions in the past, while the compound past tense is used for actions that started in the past and are still ongoing. The future tense, both simple and compound, is employed to express actions that will happen in the future.

When comparing these tenses, certain rules and guidelines must be followed. For example, the usage of auxiliary verbs may vary, and the agreement between subject and verb needs to be maintained. Additionally, the aspect of time needs to be considered when choosing the appropriate tense.

Overall, understanding the Tense Comparison Theory is crucial for mastering Bosnian grammar and effectively conveying actions in different time frames.