Student or Learner
Hi! Recently I come across this statement which says "But do I know how." I was wondering if it's possible to put do/does before subject when it's not an interrogative. If it is, what's the difference with a positive statement as "I do know/I know how to do it." and what is it called??
Thank you. xx
It's possible, but not commonly done. It's a bit more common in colloquial usage, but still fairly rare. It's just an uncommon way of stating that you do know how to do something, often used ironically.
For example, maybe I've been spending a lot of time in my garden lately pruning my tomatoes. Then somebody later asks me "Hey, do you know anything about pruning tomatoes?", then I might say "Boy, do I (ever) know about pruning tomatoes."
Without going into a great amount of useless detail it's a type of subject/verb inversion.