父(ちち) chichiは waまもなく mamonaku40 40歳(さい) saiになります ninarimasu。 My father will soon turn 40. Literal Father [topic-は] before-long 40-years-old [into-に] becomes [polite-ます]. ~になる used for aging: [age]+になる = 'to turn [age].' Using ます marks the speech as polite. agefamily~になる (become)
父(ちち) chichiは waまもなく mamonaku40 40歳(さい) saiになります ninarimasu。 My father will soon turn 40. Literal Father [topic-は] before-long 40-years-old [into-に] becomes [polite-ます]. ~になる used for aging: [age]+になる = 'to turn [age].' Using ます marks the speech as polite. agefamily~になる (become)