Final answer:
In French, the masculine singular forms 'mon', 'ton', and 'son' are used before masculine singular nouns or before feminine singular nouns that start with a vowel or a mute 'h'. They indicate possession, equivalent to 'my', 'your', and 'his/her' in English.
Step-by-step explanation:
The French possessive adjectives mon, ton, and son are masculine singular forms. They are used before masculine singular nouns. For instance, 'mon livre' (my book), 'ton chapeau' (your hat), and 'son sac' (his/her bag). They are used to indicate possession, replacing 'my', 'your', and 'his/her' in English. These words can also be used before feminine singular nouns that start with a vowel or a mute 'h', like 'mon école' (my school).
It is important to note the usage is determined by the gender and number (singular or plural) of the noun being described, not the gender or number of the subject. So even if the speaker or the person being spoken about is female, 'mon', 'ton', and 'son' would still be used for masculine singular nouns.
Learn more about French possessive adjectives