useful nouns:

useful nouns: mass nouns Countable nouns useful, useful 怎样分 Countable nouns 和 Uncountable nouns Countable and uncountable nouns Countable nouns什么意思 Countable nouns的意思 countable nouns 简写 nouns+be+adj造句!. plural nouns怎么读 singular countable nouns是什么意思 Singular and plural nouns 什麽是plural nouns uncountable nouns是什么意思 countable and uncountable nouns是什么意思 Plural countable nouns的简写