Is apple a countable or uncountable noun?
Countable
Which one is a countable noun and which one is uncountable? Salt, Grape
Salt is uncountable, Grape is countable
Is this correct? There are a dog running outside.
No, the correct way: there IS a dog running outside.
Is this correct? There are three pencils on my desk.
Yes!
Is cat a countable or uncountable noun?
Countable
Is money a countable or uncountable noun?
Uncountable
Which one is a countable noun and which one is uncountable? Book, furniture
Book is countable, furniture is uncountable
Is this correct? There is some milk on the fridge.
Yes, it is correct!
Is this correct? I need to drink some waters.
No, the correct way: I need to drink some water.
Is rice a countable or uncountable noun?
Uncountable