THE ACFT COLLIDED WITH THE GROUND IN A NOSE LOW ATTITUDE DURING FLT IN THE TRAFFIC PATTERN TO LAND. WITNESSES DESCRIBED THE PATTERN AS BEING CLOSE IN, SLOW AND LOW COMPARED TO NORMAL TRAFFIC. THE ATTITUDE OF THE ACFT WAS DESCRIBED AS NOSE HIGH. AS THE ACFT TURNED TO FINAL APPROACH THE LEFT WING DROPPED AND THE ACFT WENT INTO A STEEP NOSE DOWN DESCENT. THE ACFT STRUCK THE GROUND AT A NOSE LOW ANGLE OF 27 DEGREES AND CAME TO REST. NO GROUND SCARS WERE FOUND BEYOND THE INITIALPOINT OF CONTACT. THE LOWER FUSELAGE DUG ABOUT 16 INCHES INTO THE GROUND. NO PROBLEMS WERE FOUND IN THE EXAMINATION OF THE ACFT. THE PLTS TRAINING WAS UNUSUAL. HIS FIRST 31 HOURS OF 'DUAL' ARE UNSIGNED AND A WITNESS SAID THE INSTRUCTION WAS GIVEN BY A PRIVATE PLT. THE REMAINDER OF HIS 46 HOURS OF INSTRUCTION CAME FROM 2 DIFFERENT INSTRUCTOR, ABOUT 11 HOURS FROM ONE AND ABOUT 4 HOURS FROM THE OTHER.