This is not the first time he has betrayed us. I think it's high time we took strong actions against him. That was not the first time he had betrayed us. I thought it was high time we took strong actions against him. That was not the first time he betrayed us. I think it's high time we took strong actions against him.
Thank you CalifJim. Your notes realy help me learn. What we have in grammar books sometimes is too strange to be the real language used in daily life. Thanks again