I've been trying to work out how to form an equivalent of the English present perfect with a stative verb. I'd like to say something along the lines of:
I have known her since we were both 2 years old.
So far, I've cobbled together this:
自从我们都二岁我认识她。
I could be way off! I'm only at elementary level and this grammar point hasn't occurred in any of my books yet so maybe it's much more complex than this.