This question already has an answer here:

I want to know the difference between 'I know swimming.' and 'I know to swim.' Do native speakers understand the meaning of the sentence 'I know to swim.' I didn't see the sentence like 'I know to swim.' but I think that(I know to swim) is a right sentence grammatically. Is the sentence (I know to swim.) not acceptable but understandable by a native speaker?

marked as duplicate by user178049, Andrew, Eddie Kal, Jasper, CowperKettle Dec 31 '18 at 3:06

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

  • 2
    Both sentences are understandable, but neither are correct. You should say, "I know how to swim." – Jason Bassford Supports Monica Dec 31 '18 at 1:39
  • 1
    @JasonB - "I know swimming" could be considered correct if the person was trying to say "I know a lot about swimming." – J.R. Dec 31 '18 at 2:29
  • Some foreign speakers have to make a leap when learning English because their languages use the verb equivalent to "know" when discussing the ability to read, write, swim, fly, play a musical instrument, play a game, etc, in situations where English uses 'can'. – Michael Harvey Dec 31 '18 at 7:22

Browse other questions tagged or ask your own question.