Actually, "in the event" is an entire prepositional phrase. In is the preposition and event is the object (a noun).
"Until" is a conjunction, not a preposition. It is used to indicate when a specific event or action will happen or the time leading up to that event.
No, it is not a preposition. Again is an adverb.
No, the word "early" is an adverb, not a preposition. It is used to describe the timing of an action or event.
"Always" is not a preposition; it is an adverb, which typically describes the frequency of an action or event.
No, "afterward" is an adverb, not a preposition. It is used to indicate time in relation to a past event.
No, it is not a preposition. The word afterwards is an adverb.
The preposition "IN" means within, inside, part of a process, or at a location. It can also be used idiomatically with other terms (e.g. in the event, in order to, in which).
No. The word "anything" is an indefinite pronoun.
The word "a" is never used as a preposition. It may be used as part of a prepositional phrase. However, the word "at" is a preposition, indicating location or time.
Yes, it is a preposition. It can also be used as a conjunction.
Yes, during is a preposition. It forms adverb phrases of time.
"Until" can function as both a preposition and a conjunction. As a preposition, it is used to specify a point in time or an event. As a conjunction, it is used to introduce a clause indicating the time when something will happen.