Toddler says “I can’t” to everything

Br

My 2 year old is good at talking and expressing her feelings, etc. but a lot of the times she always replies with “I Can’t”. Whether it’s us asking if she wants to say bye to someone leaving or I just asked if she wanted to sing a song..it’s a reply to almost everything for a few weeks now. Is this normal? I ask her why but she doesn’t really know the meaning of why yet and how to answer it.