If miriam _______(win) the talent contest, she ______(become) a famous singer. Now she´s a big star. (past model form) please.

The modal verbs in English are as follows, paired as present and preterite forms:

shall and should
will and would
may and might
can and could
mote (Archaic) and must

By the way:

grammar not grammar

To form the past model form of the sentence, we need to use the past simple tense for the verb "win" and the past perfect tense for the verb "become."

If Miriam had won the talent contest, she would have become a famous singer. Now she's a big star.

To get this answer, we use the following grammar rules:
- To form the past simple tense, we add "ed" to the base form of the verb (e.g., win - won).
- To form the past perfect tense, we use the helping verb "had" followed by the past participle form of the verb (e.g., become - become).

By applying these rules, we construct the sentence in the past model form.