An abstract noun is a noun which names anything which you can not perceive through your five physical senses, and is the opposite of a concrete noun. The highlighted words in the following sentences are all abstract nouns: Buying the fire extinguisher was an afterthought.
Tillie is amused by people who are nostalgic about childhood. Justice often seems to slip out of our grasp.
A countable noun (or count noun) is a noun with both a singular and a plural form, and it names anything (or anyone) that you can count. You can make a countable noun plural and attach it to a plural verb in a sentence. Countable nouns are the opposite of non-countable nouns and collective nouns. In each of the following sentences, the highlighted words are countable nouns: We painted the table red and the chairs blue.
Miriam found six silver dollars in the toe of a sock.
The oak tree lost three branches in the hurricane.
A non-countable noun (or mass noun) is a noun which does not have a plural form, and which refers to something that you could (or would) not usually count. A non-countable noun always takes a singular verb in a sentence. Non-countable nouns are similar to collective nouns, and are the opposite of countable nouns. The highlighted words in the following sentences are non-countable nouns: Joseph Priestly discovered oxygen.
The word "oxygen" cannot normally be made plural.
Oxygen is essential to human life.
Since "oxygen" is a non-countable noun, it takes the singular verb "is" rather than the plural verb "are." We decided to sell the furniture rather than take it with us when we moved. You cannot make the noun "furniture" plural.
A collective noun is a noun naming a group of things, animals, or persons. You could count the individual members of the group, but you usually think of the group as a whole is generally as one unit. You need to be able to recognise collective nouns in order...