type
Type is a noun used for talking about a class of people or things. Type is a countable noun. After words like all and many, you use types, not ‘type’.
There were hundreds of ships of every size and type.
We work in hospitals of all types.
Elderly people need many types of public service.
After types of you can use either the plural or singular form of a noun. You can say ‘He eats most types of vegetables’ or ‘He eats most types of vegetable’. The singular form is more formal.
How many types of people live in these households?
This only happens with certain types of school.
If you use a number in front of types of, you should use a singular form after it.
There are three types of muscle in the body.
They run two types of playgroup.
After type of you use the singular form of a noun.
He was an unusual type of actor.
This type of problem is common in families.
In conversation, these and those are often used with type. For example, people say ‘These type of books are boring’ or ‘Those type of books are boring’.
This use is generally thought to be incorrect, and you should avoid it in writing. Instead you should say ‘This type of book is boring’ or ‘That type of book is boring’.
This type of person has very little happiness.
I could not be happy in that type of household.