Compound sentences and FANBOYS
She did not go to the park. It was too late in the evening. (for/so)
She did not go to the park, for was too late in the evening.
They arrived early at the show. They had great seats. (and/but)
They arrived early at the show, and they had great seats.
My family has never been to Taitung. We have seen Taipei 101. (so/but)
My family has never been to Taitung, but we have seen Taipei 101.