what kind of modulation is used for class AB PA

what kind of modulation is used for class AB PA? How about class E? please answer with details thanks~

You have to put the question in a different way:
What modulations can be amplified with less distortions by a Class-AB PA?

The answer is: Most of the constant and non-constant envelope modulations.
For modulations with high-peak to average is necessary more back-off of the input power.