An adverbial is a word (an adverb), phrase, or clause which ...

Some adverbs have the same form as adjectives.

Adjective Adverb

Louise caught the fast train. The train was going quite fast.

We didn't have a long wait. We didn't have to wait long.

Adverbials are typically used to talk about:

* where something happens (place): I put my bag on the floor.

* when something happens (time): The rain lasted all night.

* the way in which someone does something or something happens or exists (manner):

You‟re acting as if you were still a teenager.

The position of an adverbial depends on what it modifies. It can modify a word or phrase or a whole clause. Its position also depends on what type of adverbial it is and whether it is a single word or a phrase.

When an adverbial modifies a verb or a whole clause, there are three main places we can put it.

Front: Really, I can't say.

Mid: I can't really say.

End: I can't say, really.

Sometimes we can also put an adverbial after the subject: I really can't say.