I will turn twenty years old next year.

My grandfather is sixty-six years old.

My grandfather is already sixty years old.

My grandfather is already sixty years old.

My grandfather is already sixty years old.

My birthday is on the sixteenth.

My grandfather is healthy and living a long life.

I will turn twenty years old next year.

I will turn 20 years old this year.

My younger sister will turn 20 years old this year.