Countable and uncountable nouns

She eats some beef for dinner.
There are is a little beef in the fridge.
I want to buy a lot of magazines.
How many CD players do you have?
She came here with a few CD players.
He wants not to buy does not want to buy any shampoo.
They need some potatoes for dinner.
I am going to buy some bread to for breakfast.
He wants to eat a bit grape.

More naturally: He wants to eat some grapes. OR He wants to eat a few grapes.
I ate a bit of meat this night tonight in the restaurant.

Countable and uncountable nouns

She eats some beef for dinner.
There is a little beef in the fridge.
I want to buy a lot of magazines.
How many CD players do you have?
She came here with a few CD players.
He does not want to buy any shampoo.
They need some potatoes for dinner.
I am going buy some bread for breakfast.
He wants eat some grapes.
I ate some meat tonight in the restaurant.  

Very nice English!  These are really tricky.  My English is American English, British may be a bit different in spots.