For: I have been here ... an hour., He hasn't eaten anything ... three days. , I haven't seen you ... ages., He worked there ... four months., I have lived in Vienna ... two years. , I haven't heard anything from her ... a long time., Since: I haven't seen her ... April, She hasn't been to New York ... 1985., I haven't played football ... I finished school., He's been there ... 2 o'clock., I have been friends with him ... we started school., She hasn't got my mail ... last week.,

for vs since

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