The main reasons why there is a need of clutch repair, are increased noise when you turn the clutch jerks when operating the clutch

incomplete inclusion of coupling (the clutch "slips"), incomplete clutch (clutch "leads").
To check the status of the clutch sit in the car, set Parking brake, turn off the music and other devices emitting noise. Not to interfere with external sounds, close Windows and doors. First of all, push the clutch pedal with the engine off. The pedal must be pressed gently, smoothly, without failures and rattles. If you see increased noise and other sounds, make sure that they do not come from the return spring of the pedal. If your car uses a clutch cable, the noise may come from it. If there is abnormal noise when pressing, make sure it is not from the transmission, otherwise the clutch is in need of repair.
Start the engine of a car, and, not including the transmission, press again the clutch pedal. Changing as you press the pedal the sound or noise can indicate deterioration of the release bearing of the clutch. In the case of a cable clutch, the noise may be a worn cable.
For the next test, make sure you have a well adjusted handbrake. Sit in a car, the most set the Parking brake and start the engine. Squeeze until the end of the clutch pedal and put it in first gear. Without turning off the Parking brake, gradually release the clutch pedal. Do not tap on the gas pedal. If as you release the clutch, the engine revs begin to fall significantly until siloxane motor, the clutch is working properly. Otherwise, the grip is not until the end off and needs repair.
To check clutch operation, sit in the car and start the engine. On a running motor, crank to the end of the clutch pedal. After a second or two after pressing, put her in reverse. If the gear is engaged smoothly and without effort, the clutch is fine. In addition, the engine was running, try switching between first and reverse gear. Hit the clutch and put it in first gear without releasing the clutch, turn off the speed. Release the clutch pedal and then press again and engage reverse gear. Repeat the cycle several times. If the switching occurs smoothly and without crunching your clutch properly. Otherwise, check the clutch basket and friction plate.