"I have much problems with English."
"I don’t have many knowledge on this topic."
Hmm those don’t sound right, do they?
This is the difference between countable and uncountable nouns. All nouns can be sorted into these groups.
Countable nouns can be used with “a” or numbers. We can also use some.
Uncountable nouns are always used with singular verbs but we cannot count them with numbers or “a”. We can also use some.
Here are some more examples of countable and uncountable nouns.
How to Count Uncountable Nouns
If we can to count them, we have to talk about the container they’re in.
Many / Much
A very important rule that people often get wrong is the difference between many and much.
Remember that many is used for countable nouns and much is used for uncountable nouns. If you can remember this your English will be better than some native speakers, who commonly get this wrong!
Amount / Number
Similarly, the word amount is used for uncountable nouns, and number is used for countable nouns.
See if you can think of any more nouns that are countable or uncountable and let me know in the comments.
I've created a free 3-day email course to introduce you to some of the most common English expressions.