For those unfamiliar with the term " Pretributional Rapture" let me share my basic understanding. Rapture is the theory or beliefthat Jesus will take Christians to heaven without experiencing death. "Pretributional" is a word that describe when the rapture will occur. Pre means before so pretributional means before the tribulation or great tribulation.
Other beliefs are midtributional rapture . (mid for middle of tribulation). Post tribulational rapture ( post for after tribulation).
Mathew 24 and 25 seem to indicate Christians will have to undergo some kind of tribulation. Lord Jesus warned early disciples to pray and watch.
Please read Matthew 24 and 25 and see what it say.