gokigen.jp/koto-toiukoto-meaning-usage-the-fact-that-sentence-in-japanese/
Explains the Japanese grammar patterns …こと and …ということ, which nominalize clauses to mean "the fact that." Covers formation rules, differences in nuance, examples, and practice exercises for intermediate learners.
GrammarJLPT N3Sentence patternsAdjectivesConversationFor childrenTutors and teachersParticlesJLPT