For example, when did you toddler ask, "What's that?" Or, "Watcha doin'?"
Our son is about 20 months and he'll ask "that?" quite a bit - he's been doing it for a few months now. He doesn't ask a whole lot of other questions yet though, and not really in a form that can be construed as a sentence.
Apartment Farm - the chronicles of my cooking, gardening, crafting and other such things.
My 17mo has been asking "dat?" for a few months now, and "where Daddy?" but that's it so far.
Liz Lovin' DH DS (12) and forever missing DD (12/02/07)
From the withered tree, a flower blooms~ He's here!!! So crazy in love with my boy!!! 12/14/11
Just fyi, asking questions is almost always tied directly to Mean Utterance Length (how many words does a little one say at once. So for example, "more milk" would be a 2 word utterance). Questions usually come with a MUL of 3-4 words, which can happen anywhere from 18 months - 3 years depending on the kid :)
I'm not sure exactly where the average is, but I assume you are worried about asking questions? Or are you just curious?
If you are worried - if your child doesn't use 3-4 word phrases regularly then they aren't there yet and you shouldn't worry! (unless they clearly delayed in their MUL). If they are using longer sentences but still not asking questions then I would maybe look into it further. Hope that isn't endlessly confusing!
DD started asking "What's that?" CONSTANTLY at around...22 months? It's slowed down at almost 25 months, but she still does it a lot. We haven't gotten to "why" yet.
Fiction writer by training, writer/editor of anything anyone will hire me for by trade. Me + D=my girls E (4/2011) and little N, 1/2014.
My DD (22 months) has been asking questions for a while now. 'What is that?' and 'what that person doing?' are probably the most frequent but I think it started with 'where Daddy is?' like several pp have said. I also remember her non-verbally asking if things were ok to touch when she was younger.
I was so excited when just the other night she asked her first 'why' question: she nursed for a while then pulled off, looked at the nipple and asked "Why (her name) nurse on Mommy's milkies?" It was so cute!