if equilibrium is achieved in a reversible reaction......do those reactions continue?

The product does form but since there is an equilibrium then there are just as much reactants as there are products. It will never be ALL product or ALL reactants.

If a reaction reaches equilibrium it means that there is no NET change...this does not necessarily rule out any changes which act to balance each other.

Say you have the reaction,

A + B <---> AB

This reaction is reversible, A and B can combined to form AB, and AB can decompose to form A + B.

The forward and reverse reactions are constantly occurring, however, at equilibrium the rate of the forward reaction (formation of AB) equals the rate of the backward reaction (A + B)...so there is no net change.

There is just as much A + B forming AB as there is AB forming A + B.

the reactions always continuing... it just goes back and forth really fast giving the same concentration of reactant and products. However if you add more reactant, there will be a shift to the product side producing more products until equilibrium is reached and vice versa

Huh? lol