'should not have' (之前我写的shoul have not应该是错的) We can use ' should not have' to speculate negatively about what may or may not have happened.•She shouldn't have left work yet. I'll call her office.•He shouldn't have boarded his plane yet. We can probably still get hold of him.•They shouldn't have sent the report off for printing yet. There is still time to make changes.We can also use 'should not have' to regret past actions.•I shouldn't have shouted at you. I apologise.•We shouldn't have left the office so late. We should have anticipated this bad traffic.•They shouldn't have sacked him. He was the most creative person on their team.