Questions & Answers about J'ai vingt ans.
Why do we use ai (have) instead of suis (am) to say "I am"?
Can I just say J'ai vingt like we say "I'm twenty" in English?
Why is it J'ai instead of Je ai?
The word je (I) drops its e and gets an apostrophe whenever the next word starts with a vowel (or a silent 'h'). Since ai starts with an 'a', je ai squeezes together into J'ai to make it flow smoother when speaking.