go back in time
Yes, it is a phrase that indicates time. It will be an adverbial phrase.
Yes, "in time" is an adverbial prepositional phrase.
To make it into a phrase you really should be using quotation marks: "for the last time" is a phrase.
Which phrase defines the time called prehistory
Yes. It is a prepositional phrase used as an adverb (answers when).
The phrase "all the time" has three syllables. The syllables in the phrase are all-the-time.
"At that time" is the prepositional phrase.
The phrase frozen in time means has not/hasn't been touched for centuries.
"At that time" is the prepositional phrase.
"Short on time" is the correct phrase. It means lacking sufficient time for a particular task or activity.
go back in time
Infinitive phrase.