Dodge Ram Transmission Clutch Not Working

Put In Reverse Yesterday Just Revved Up Without Moving. Today Put In Reverse And It Worked. Other Gears Had No Problem.

Was Driving An Stopped An When I Took Off Truck Would Not Go Into Gear..clutch Seems To Be Find The Pedal Is Good ,,just Trany Will Not Go...

If I’m Able To Put My Truck Into Gear Without The Clutch Does It Mean That My Clutch Needs Replaced?