yes Suddenly, the tower tumbled. Finally, the war is over.
In the sentence "My friends came because it was my birthday," the adverb is "because." It introduces the reason for their coming, providing additional context to the action.
"Immediately" is the adverb.
An adverb. If you like, it adds to a verb an additional meaning. So, he came. How did he come? He came late.
There is no adverb: the entire phrase beginning with "that's" is the object of the verb "think." (you think that)
adverb
Correctly is the adverb in that sentence.
That sentence does not have an adverb.
A delayed adverb is an adverb that appears in a different position than expected in a sentence, often for emphasis or stylistic reasons. It is used to create a specific effect or to draw attention to the adverb or the information it modifies.
The adverb "often" can be used at the beginning of a sentence to indicate frequency or regularity of an action or event. For example, "Often, I go for a run in the morning."
Perhaps you may find him in the library. Perhaps is an adverb usually it goes at the beginning of a sentence.
Running is acting as an adverb, not modifying, but adding extra information to the verb came.
Down in your sentence is an adverb telling where.