# Do you not know that your bodies are members of Christ?

"You should know that your bodies belong to Christ." 

# Should I then take the members of Christ and join them to a prostitute? May it not be!

"I am part of Christ. I will not take my body and join myself to a prostitute!" or "We are parts of Christ's body. We must not take our bodies and join ourselves to prostitutes!" 

# May it not be!

"That should never happen!" or "We must never do that!"