I'm not dreaming. I'm just thinking.

我没有做梦，我只是在思考。

youdao

I have to pinch myself to be sure I'm not dreaming!

我得使劲掐下自己看是不是在做梦！

youdao

Ask me a question now and ask me this question again tomorrow when you see me, so I'll know I'm not dreaming.

现在问我一个问题，明天看到我的时候问我同样的这个问题，我就知道我没有做梦。

youdao

How do I know," Descartes said, "I'm not dreaming right now?"

我又如何能确定我现在不是在做梦呢"

耶鲁公开课 - 心理学导论课程节选

Well, not during those times, perhaps, when I'm dreaming while I'm asleep.

也许当中不包括，我在做梦的时候。

耶鲁公开课 - 死亡课程节选