The adverb form for "period" is "periodically."
"Awhile" is an adverb. It is used to indicate a period of time or duration.
No, "century" is not an adverb. It is a noun that refers to a period of 100 years.
No, "last week" is a noun phrase that refers to a specific period of time in the past. It does not function as an adverb.
No, "eventually" is an adverb, not a conjunction. It is used to show that something is expected to happen over time or after a period of time.
No, "in the summer" is a prepositional phrase that indicates a specific time period. It does not function as an adverb.
No. Day is a noun, meaning daytime or a period of time. The adverb is daily.
"Awhile" is an adverb. It is used to indicate a period of time or duration.
No, "century" is not an adverb. It is a noun that refers to a period of 100 years.
No, "eventually" is an adverb, not a conjunction. It is used to show that something is expected to happen over time or after a period of time.
No, "last week" is a noun phrase that refers to a specific period of time in the past. It does not function as an adverb.
No, "in the summer" is a prepositional phrase that indicates a specific time period. It does not function as an adverb.
Yes, running may be used as an adverb in some context.
It can be, as the term for a period in cricket. But over is usually an adverb or preposition.
In a way. The word time can be an adverb when it modifies an action (this time, last time, many times). It can also be a noun, or noun adjunct (time travel, time period), or a verb (to measure time).
It is an adverb phrase, although in forms such as "The period after a supernova is marked by stellar collapse" it seems to be an adjective phrase.
Yes, "afterwards" is an adverb, not a preposition. It is used to indicate a time that is after a particular event or period.
Yes, the word yet is an adverb. It can refer to a time period (past or present) or mean "nevertheless." (The latter is how it is used as a conjunction, without the word 'and'.)