The Broken Oath - 1913 is rated/received certificates of: UK:U
The Oath - 1921 II is rated/received certificates of: UK:A
Blood Oath - 2007 V is rated/received certificates of: USA:R
Under Oath - 1997 is rated/received certificates of: Argentina:13 Iceland:16 USA:R
Oath of Vengeance - 1944 is rated/received certificates of: USA:Passed (National Board of Review) USA:Approved (PCA #10408)
Baretta - 1975 The Coppelli Oath 1-7 is rated/received certificates of: Canada:PG (video rating)
CSI Miami - 2002 The Oath 2-20 was released on: USA: 19 April 2004 Hungary: 11 November 2004 Japan: 8 March 2005 France: 10 May 2006
Silent Witness - 1996 Hippocratic Oath Part 2 11-6 is rated/received certificates of: Netherlands:12
Silent Witness - 1996 Hippocratic Oath Part 1 11-5 is rated/received certificates of: Netherlands:12
Blood Oath - 1990 is rated/received certificates of: Australia:M Finland:K-16 Germany:16 (bw) Iceland:16 Portugal:M/12 Sweden:15 UK:15 USA:R
Star Trek Deep Space Nine - 1993 Hippocratic Oath 4-3 is rated/received certificates of: USA:TV-PG
There is no past tense - oath is a noun. However you do "swear an oath", so the past tense of "She swears an oath" would be " She swore an oath".