Identify the kind of Adverb used in the following sentence:

He couldn't return immediately.

Adverb of Time

The correct answer is Option (1) → Adverb of Time

Here's why:

Adverb of time: tells when something happens (e.g., now, then, soon, later). "Immediately" clearly specifies the time frame for his return.

Relative adverb: connects clauses and introduces information (e.g., which, when, where). "Immediately" doesn't connect clauses or introduce information.

Adverb of manner: describes how something is done (e.g., quickly, slowly, carefully).

Interrogative adverb: asks a question (e.g., when, where, why). "Immediately" isn't asking a question.

Therefore, "immediately" functions as an adverb of time in this sentence.