1 Corinthians 14:28

but if there be no interpreter, let him keep silence in the church; and let him speak to himself, and to God.

'if there be no interpreter' -implying that the tongue-speakers were required to know ahead of time if an interpreter was present. This demands that tongue-speaking wasn't. gift that "overwhelmed" one. Neither was it something that couldn't be predicted. The tongue-speaker could speak in tongues whenever he wanted! The gift could be exercised at will. So don't let any so-called tongue-speaker today weasle out of "proving their gift", by the excuse that "they just don't know when the Spirit is going to move them."

'let him keep silence in the church' -'Clearly, then, the tongue-speaker wasn't "overwhelmed" by the Spirit. Not only was the prophet in control of himself (32), the tongue-speaker was too.' (McGuiggan p. 184)

Remember this verse when someone says, "The Spirit is moving me and. can't help myself." Notice also. In those whole discussion on spiritual gifts, nothing is said about the Corinthians "rolling on the floor, going into convulsions, fainting, passing out, yelling, jumping up and down, or clapping hands." Evidently, some Charismatic groups are prone to worse abuses in the assembly, than even the Corinthians!

'let him speak to himself, and to God' -i.e. use the gift in private outside of the assembly?