Hold on and don't let go until I say so.

握紧，我让你松手时再松开。

《牛津词典》

I say so by way of example.

我这样说只是举例而已。

《新英汉大辞典》

When did I say so?

这话我多会儿说来？

《新英汉大辞典》

So you would say in the past tense "I lay on the bed because I was tired."

VOA: special.2010.02.11

And I say something about Citizen Kane but go beyond it, so I thought this would be a good time in your life for you to see it or see it again.

我不仅要说《公民凯恩》,还要说别的，我认为这会是你们人生中的美好时光,你们去看这个电影或者再一次看。

麻省理工公开课 - 电影哲学课程节选

Every city has their own unique qualities and things to do, so I cannot really say a specific city.

每一座城市都有自己的特质和可以做的事情，所以我说不出具体哪个城市最好。

我喜爱的城市 - SpeakingMax英语口语达人

She doesn't have to hug or kiss anyone just because I say so, not even me.

CNN: I don't own my child's body

What I will say -- so what I will say, though, is that during the trip I think it is important to underscore that several Asian nations have been very strong contributors in Afghanistan through security means, through civilian assistance, through financial assistance.

WHITEHOUSE: THE WHITE HOUSE

Our conversations were short and stupid, and there was no way to say what I really wanted to say, so I talked about anything, the first thing that came into my head, some nonsense I hoped would make her smile.

NEWYORKER: Clara