2001 Ford Taurus How to fix my car if the engine turn off w

I have ford Taurus 2001 the problem is while I drive it it is good but when I stop for like 5 sec. I have to but it in N and give it some gas (accelerate), otherwise it will turn off. Any body know What Is wrong and how to fix it (if I have to change a part, give me the name of the part please)