Some cannot by itself carry the meaning 'some more time;' it needs a reference to the word time in order to do that: After four years' time and then some. a) In the first sentence, it's unclear whether some functions as a pronoun referring back to years or is an adjective modifying an omitted noun such as months or time. b) In the second sentence, it's quite clear that some functions as a pronoun (Ref.), which gives the phrase the interpretation, After four years and then some more years.Can one say: a. After four years and some, we finally met again. b. After four years and then some, we finally met again.