It shows the doer of the action.It comes before verb and indicates this action or work is done by it/him/her etc.Ex.Susan switched off the lights. Who switched off the lights? The answer is Susan (subject of the sentence)
Answer:
To make sure everyone understands the content
Explanation:
It is d I have done this before
Answer:
Polishing silver
Explanation:
The butler got his nose all screwed up because polishing silver takes a toll on one's sinuses
The adverb phrase modifies the verb , so the answer is A. jogs.
