GRAMMAR :: Some and Any

Some ( = algo / algunos )

Use : In positive sentences. e.g.

I'm going to buy some clothes => Voy a comprar ropa.

We made some mistakes => Hicimos algunos errores.

We sometimes use some in interrogative sentences. 

Offers ( = Ofrecimientos ) => Would you like .......?  e.g. Would you like some coffee? 

Ask ( = Pedir ) => Can I have ....? e.g. Can I have some soup, please?

Any 

Use : In negative and interrogative sentences. e.g.

There isn't any milk in the fridge => No hay leche en la nevera.

Do you need any help? => ¿Necesitas ayuda?

Both of them can use alone too, without substantives. e.g.

I didn't take any photographs, but Jane took some.

You can have some coffee, but I don't want any.