Sorry,I don"t know what you said just now,for I____about som

Sorry,I don"t know what you said just now,for I was thinking about something important.Would you please say it again?翻译; 不好意思,我没听清你刚才说了什么.因为我那时在想一些重要的事情,可以再说一遍吗?I was thinking about something important.一句是过去时态的进行动作,“正在做某事”,与“don"t know ”的意思相对应.