Google detects invalid keywords on my site

I have a question about keywords detection used by webmaster tools.

Google detects invalid keywords on my si开发者_如何学Gote like "to", "for", "and" etc.

That words used repeatedly in all of internet sites. It seems that google ignore my keywords meta tag. How can i fix this problem?

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The keywords meta tag should contain a list of keywords related to the content of your site, not sentences or generic words like "to" or "for".

Modern search engines don't take that tag into account much anyway.