What is a fronted adverbial?
An adverbial is a word or phrase that has been used like an adverb to add detail or further information to a verb. (An easy way to remember what an adverb is: it adds to the verb.)
Adverbials are used to explain how, where or when something happened; they are like adverbs made up of more than one word.
In the sentences above, the verbs are in pink and the adverbials are in blue.
'Fronted' adverbials are 'fronted' because they have been moved to the front of the sentence, before the verb.In other words, fronted adverbials are words or phrases at the beginning of a sentence, used to describe the action that follows.
A comma is normally used after an adverbial.