The Progressive Theory in Tagalog Grammar is an essential aspect of verb conjugation. In Tagalog, the progressive aspect is used to indicate that an action is currently happening or is ongoing at the moment of speaking.

To form the progressive aspect, the verb root is combined with the infix “inu-” or “ini-” before the first syllable of the verb root. This infix is what gives the verb its progressive meaning.

For example, the verb “kain” means “to eat.” To form the progressive aspect, it becomes “kumakain.” This form indicates that the action of eating is currently happening.

Another example is the verb “takbo” which means “to run.” When the progressive aspect is added, it becomes “tumatakbo,” which signifies that the action of running is occurring at the moment of speaking.

The Progressive Theory in Tagalog Grammar provides a way for speakers to convey the ongoing nature of an action, giving more depth and clarity to their sentences.