1. I'm not myself today.

我今天不在状态。

2. I'm all mixed up.

我都糊涂了。

3. Your guess is as good as mine.

我也没搞清楚。

4. I was messed up for a long time.

过去很长一段时间我都过得一塌糊涂。

5. You're a real nitwit.

你真是个糊涂虫。

6. I don't think she's all there.

我觉得她脑子不太清醒。

7. I just zoned out for a moment.

我刚才走神了。

8. Somehow my brain isn't functioning today.

不知怎么的，我今天脑子不太好使。