adverbial is an adverb, adverbial phrase or adverbial
clause which gives us additional information about e.g. the
time, place, or manner of the action which is described
in the rest of the sentence:
have been living here in this house for over twenty years.
were sleeping peacefully in our beds when the earthquake struck.
these examples, you can see that the most common position for adverbials
is at the end of the sentence Place adverbials (here in this
house) come before time adverbials (for over twenty years).
Manner adverbials (peacefully) come before place adverbials
(in our beds).
do not always follow this pattern. This applies particularly to
adverbial clauses. In the above example we could begin with the
adverbial clause, if it was important to highlight it at this stage
in the discourse:
the earthquake struck, we were sleeping peacefully in our
adverbials answer questions such as:
did you arrange to meet him? ~
to meet him outside the bank.
did you arrange to meet him there?
that he could give me the money.
How long did you wait for him?
for half an hour but he didn't arrive.
When did you first meet him?
met when he became the manager of the bank.
How often have you been seeing him since then?
a week, usually. More frequently, if his wife was away.
from the above examples that adverbs of frequency are often
placed in mid-position in the sentence, as well as at end-position.
Placing them before the subject is sometimes also possible:
sometimes call on my younger sister when I'm in London
never see my older sister, but occasionally I call
my younger sister.
I see her from time to time. We get together once in
a blue moon.