Close. There are three main ways of using "after": a) as a preposition, which would usually precede a noun, a preposition or (as in your "1") a gerund: "I came after the show", "I came after him" or "I came after going to the show". b) as a conjunction, which connects what would otherwise be an independent clause to the subsequent event (as in your "2"): "I came after I went to the show". c) As an adverb: "He came first, and I came soon after" (Also note it should be "describe something WHICH/THAT happens".) Consequently, your