An electric car has batteries and an electric motor. If your battery runs low, you have to recharge.
A hybrid car has a gasoline (or diesel) engine which can provide one of two things: Usually, it can be the main drive motor, which is always on, provides power, and recharges the batteries. The electric engine is there to provide additional torque/horsepower for needed acceleration. Other method of hybrid cars uses the electric motor as the main drive motor, and then use the gas/diesel engine as simply a generator: All it turns on for, is to recharge the battery when it runs low. It recharges the battery and then shuts back off.
The main difference between a hybrid and an electric car is the source of power. A hybrid car uses gasoline that powers the main drive and also recharges the batteries. On the other hand an electric car uses batteries for ever function and the batteries have to be recharged separately from the car.