Do marines still fight with swords in combat?

No I don't think so sWords are now used as combat weapons because instead of that military army prefer to use guns, grenade etc (as a result of improvement in technology).

The sWord is no longer used for combat. The military uses combat army guns like 45 colt, AK-47 AK-97 RPG, bazooka, rocket launcher, grenade launcher, throw grenades, button explosives, sniper, pistol, bombs, High velocity sling shot.