Countable: There were not enough cups at the party, so I drank from the bottle.
Uncountable: I just had enough money to buy her an ice cream.
Countable: There were no passengers in the bus.
Uncountable: She screamed for help, but received no help.
Countable: There wasn’t any policeman around when I was robbed.
Uncountable: It didn’t come with any instructions about assembling it.
Countable: She received the most Christmas cards in the family.
Uncountable: She earned the most money in the family.
Countable: Not all monkeys have tails.
Uncountable: I have been trying all morning to fix my old computer.