There are two syllables like so: a-gain.
"It" is not a preposition. "It" is a pronoun. Instead of repeating what something is, you can replace the actual word for something with the word "it." Example: The pie was delicious. I would eat it again.
The affix 're-' in the word 'regain' means to do something again or to return to a previous state. In this case, 're' indicates the act of getting back something that was lost or taken away.
a-gain
'Til I Gain Control Again was created on 1982-10-27.
again
The word gain is a verb. The past tense is gained. Gain can also be a noun.
The fuel filter may be plugged, replace it.
osmosis!
Such a resource is classed as renewable, as we can replace the resource as it is used.
There are 2 syllables. A-gain.
2 a-gain.