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Adverbs of manner most often occupy the end position of a clause, where they follow an intransitive verb, or the direct object of a transitive verb.
e.g. We waited patiently for the play to begin.
I sold the strawberries quickly.
In the first example, the adverb of manner patiently follows the intransitive verb waited. In the second example, the adverb of manner quickly follows the direct object strawberries of the transitive verb sold.
An adverb of manner may be placed at the beginning of a clause, in
order to emphasize the idea expressed by the adverb. e.g. Patiently,
we waited for the show to begin.
Quickly, I sold the strawberries. In these examples, the ideas expressed by patiently and quickly are emphasized.
Adverbs of manner are often placed in the middle position of a clause,
particularly when the clause contains no adverb of frequency. e.g. I
slowly opened the door.
I have carefully considered all of the possibilities. In the first example, the adverb of manner slowly precedes opened, a verb in
the Simple Past. In the second example, the adverb of manner carefully
follows the auxiliary have of the verb have considered.