There's also the verse about those who say evil things about Jesus being forgiven versus those who blaspheme the HS never being forgiven.
It's hard to imagine that being twisted into a defense of purgatory, but it is.
31 Wherefore I say unto you, All manner of sin and blasphemy shall be forgiven unto men: but the blasphemy against the Holy Ghost shall not be forgiven unto men.
32 And whosoever speaketh a word against the Son of man, it shall be forgiven him: but whosoever speaketh against the Holy Ghost, it shall not be forgiven him, neither in this world, neither in the world to come.
Twisting? Hardly. In the plain sense of the text, according to vs. 32, the sin of blaspheming against the Holy Spirit is a sin that cannot be forgiven in this world (which I'm assuming most take no issues with), nor in the world to come. That said, if there were no sins forgivable in the world to come, this last part of Christ's statement would not be necessary. There are the sins that are forgiven here (via the sacrament of penance normatively or by perfect contrition) and those that are remitted after death (in Purgatory).