nominalizer の
grammar307 sentences
The particle の attached to a clause to nominalize it — turning a verb phrase or clause into a noun phrase. 'The act of X / the fact that X.' Lets a clause be embedded as the content of perception, knowledge, attention, or attitude: ~のを見る ('see that ~'), ~のに気が付く ('notice that ~'), 走るのが好き ('like running'). Often interchangeable with こと in some contexts but with different nuances — の feels more immediate/concrete, while こと leans abstract/factual; certain constructions (e.g. ~のを見る) favor の.