Is it okay to use "after" with Past Simple in the subordinate clause and then Present Perfect in the main clause?
After Marry married John, Jack has been very reticent about his personal plans.
After the revolution took place, the neighboring states have warned their citizenry against trying similar developments.
After the merger happened, the new incorporation has steadily increased its daily output.
After some factories were shut down, environmentalist have kept repeating again and again that this was their merit.