Progressive theory, or the progressive aspect, plays a significant role in Macedonian grammar. It is used to express ongoing or continuous actions in the present, past, or future tenses. In Macedonian, the progressive aspect is formed by the auxiliary verb “sum” (to be) followed by the present participle of the main verb.

For example, if we want to say “I am studying,” we would use the present tense of the verb “sum” (já sum) followed by the present participle of the verb “učam” (study), which is “učee”.

Another example is “They were playing,” where we would use the past tense of the verb “sum” (bea) followed by the past participle of the verb “igraat” (play), which is “igraa”.

Similarly, in future tense, we would use the future tense of the verb “sum” (ke bidam) followed by the present participle of the main verb.

Overall, understanding the progressive aspect is crucial for learners of Macedonian grammar as it enhances the ability to describe ongoing actions in a clear and concise manner.