a question regarding Hebrew suffix's

Question

can this Hebrew suffix:

ָ יו‎ (Kamatz,Yud and Vav)

Third person, singular, masculine possessive. His

סוּסָיו‎ susav (his horses)

תּוֹרוֹתָיו‎ torotav (his laws)

be interpreted with this suffix:

וּ‎ (Shuruk)

Third and Second person, masculine plural. They will do, You will do

יִשְׁמְרוּ‎ yishm'ru (they will keep)

תִּשְׁמְרוּ‎ tishm'ru (you will keep)

instead of this suffix:

וֹ‎ ( Cholam male)

Third person, singular, masculine possessive. His

סוּסוֹ‎ suso (his horse)

תּוֹרָתוֹ‎ torato (his law)

Answer 1

No, they are not interchangeable. One is a verb ending, the other a possessive pronoun ending. Shuruk and Cholem are both derived from vav, but have different pronunciations and functions.