Je suis vs. Jai

when people talk about their age， "I have lived for many years"， if that makes sense. I hope this makes sense :) ，。

The difference in usage is a little tough to understand initially， but you tend to get the hang of it by time. For this instance， and hence the translation becomes "I have gained many years of life" or， you are right about them saying "J'ai vingt ans" instead of 'Je suis vingt ans". This is because age is considered as an object。