There can be many resonating forms for a compound. It is to be noted that they are not in any equilibrium to each other. Each and every structures will contribute to the ultimate hybrid, according to their stability. The most important point is that resonating hybrid is not a mixture of the resonating structures, but rather an intermediate of them.
This is what my book writes. But if it is intermediate, it must contain at least some properties of each and every structure. Now, one structure has no charge, while other structure has one $+ve$ charge & one $-ve$ charge . In the final structure, it still contains both the charges. So, how can it be an intermediate as it got no contribution from the first?? Confused. Please help.