2011成人英語三級口語：這次我真的給弄糟了

I really screwed up this time.
    這次我真的給弄糟了。
    今天的幾個句子是有關(guān)后悔的：
    1.Oh, no! I shouldn’t have done it. 哦，不!我要是不那樣就好了。
    2.I should have known better. 我早該弄清楚一些。
    3.I shouldn’t have said that. 我要是不說那話就好了。
    4.I wish I wouldn’t have said that. 我早該知道了。