The above should read: I ate spaghetti. The indefinite should not be used with uncountable nouns. (rule 3.1). Spaghetti is an uncountable noun because it is made up of small pieces (uncountable noun classification).
The above should read: I ate spaghetti. The indefinite should not be used with uncountable nouns. (rule 3.1). Spaghetti is an uncountable noun because it is made up of small pieces (uncountable noun classification).