By Countable nouns, Analogies

Milky, I'm sorry, but the 'sheep' analogy is not relevantl Here, quoted from Purdue University Online Writing Lab: While uncountable nouns do not generally take a plural form, sometimes they may be pluralized when used in a countable sense. The difference between the uncountable and countable...

Hvpl wrote:I understand that certain nouns (collective nouns?) that do not have a plural word. E.g. aircraft, rain and perspiration. However, I come across such usage, specially in Asia. "Many aircraftS are taking off and landing at this airport." or "Beads of perspirationS fell from his...

You are right, Paco. The word 'problem' is definitely a countable noun. That's why when I first encountered the expression 'have x problem -ing,' perhaps decades ago, I thought it's a rather unusual construction. This peculiarity compelled me to memorize the expression by rote then. Along the...