This word is a classifying Adjective. Classifying adjectives put things into groups or classes so they cannot normally be modified by having adverbs such as very placed in front of them. Unique means ‘of which there is only one’, so it is, strictly speaking, wrong to say, for example:
He was a very unique person.
And the following example is double absurd:
Almost the most unique residential site along the South Coast. On the other hand there are a small number of modifiers that can be used with unique. The most obvious is almost:
Britain is almost unique in continuing to charge almost all its domestic customer on an unmeasured basis. [for water]
This can be justified because it means that Britain is not the only country to do this; there are a few others.
There is, however, a looser meaning frequently given (especially in informal speech and writing) to unique: ‘outstanding or remarkable’. When it is used in this sense it is often preceded by very:
A very unique ‘Town’ house situated a stone’s throw away from the River Thames and Oxford City Center.
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Countable nouns have both a singular and a plural form. Most nouns are countable, because they refer to things that can be counted. By contrast, a smaller number of nouns do not regularly have a plural form and are called uncountable. Example include: mud, snow, butter.
In addition, many Abstract nouns are normally uncountable. For example: unhappiness, dead, darkness.
Many uncountable nouns can, however, also be used in the plural in certain circumstances. For example: beer is usually uncountable, but can be a countable in sentences such as:
Beers of the world.
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A verb that takes an object:
Subject Verb Object
They hit the crossbar.
Some verbs are always or usually transitive. For example:
Admire avoid but complete cover create
Cut damage demand destroy discover enjoy
Other verbs can be both transitive and intransitive (i.e. they do not take an object). An example is the verb run:
He ran a successful wine business is Marylebone. (transitive)
I just left my car and ran. (intransitive)
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This has three uses:
 Adverb:
I didn’t know it then, but I know it now.
 Conjunction:
The President spoke and spoke well, then sat down.
 Adjective (less common):
The adjective on bending the rules came from the then Defence Minister, Alan Clark.
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These are the three commonest Relative Pronouns used to introduce Relative Clauses. Who(m) is used to refer to people. That can be used to refer to people or things, while which is only used to refer to things.
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